6937434421 has 4 divisors (see below), whose sum is σ = 6977535372. Its totient is φ = 6897333472.

The previous prime is 6937434403. The next prime is 6937434437. The reversal of 6937434421 is 1244347396.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3604681521 + 3332752900 = 60039^2 + 57730^2 .

It is a cyclic number.

It is not a de Polignac number, because 6937434421 - 2¹¹ = 6937432373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6937434821) 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, 20050216 + ... + 20050561.

It is an arithmetic number, because the mean of its divisors is an integer number (1744383843).

Almost surely, 2^6937434421 is an apocalyptic number.

It is an amenable number.

6937434421 is a deficient number, since it is larger than the sum of its proper divisors (40100951).

6937434421 is a wasteful number, since it uses less digits than its factorization.

6937434421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40100950.

The product of its digits is 435456, while the sum is 43.

The square root of 6937434421 is about 83291.2625729734. The cubic root of 6937434421 is about 1907.2148969001.

The spelling of 6937434421 in words is "six billion, nine hundred thirty-seven million, four hundred thirty-four thousand, four hundred twenty-one".