3437421997 has 4 divisors (see below), whose sum is σ = 3555953820. Its totient is φ = 3318890176.

The previous prime is 3437421971. The next prime is 3437422003. The reversal of 3437421997 is 7991247343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7991247343 = 84913 ⋅94111.

It can be written as a sum of positive squares in 2 ways, for example, as 1888684681 + 1548737316 = 43459^2 + 39354^2 .

It is a cyclic number.

It is not a de Polignac number, because 3437421997 - 2¹¹ = 3437419949 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3437421997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3437421697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59265868 + ... + 59265925.

It is an arithmetic number, because the mean of its divisors is an integer number (888988455).

Almost surely, 2^3437421997 is an apocalyptic number.

It is an amenable number.

3437421997 is a deficient number, since it is larger than the sum of its proper divisors (118531823).

3437421997 is a wasteful number, since it uses less digits than its factorization.

3437421997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118531822.

The product of its digits is 1143072, while the sum is 49.

The square root of 3437421997 is about 58629.5317822000. The cubic root of 3437421997 is about 1509.1912686137.

The spelling of 3437421997 in words is "three billion, four hundred thirty-seven million, four hundred twenty-one thousand, nine hundred ninety-seven".