3897399937 has 4 divisors (see below), whose sum is σ = 3897803476. Its totient is φ = 3896996400.

The previous prime is 3897399931. The next prime is 3897399971. The reversal of 3897399937 is 7399937983.

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 3539774016 + 357625921 = 59496^2 + 18911^2 .

It is a cyclic number.

It is not a de Polignac number, because 3897399937 - 2¹⁹ = 3896875649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3897399931) 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, 186918 + ... + 206719.

It is an arithmetic number, because the mean of its divisors is an integer number (974450869).

Almost surely, 2^3897399937 is an apocalyptic number.

It is an amenable number.

3897399937 is a deficient number, since it is larger than the sum of its proper divisors (403539).

3897399937 is an equidigital number, since it uses as much as digits as its factorization.

3897399937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403538.

The product of its digits is 69441624, while the sum is 67.

The square root of 3897399937 is about 62429.1593488171. The cubic root of 3897399937 is about 1573.7110390769.

The spelling of 3897399937 in words is "three billion, eight hundred ninety-seven million, three hundred ninety-nine thousand, nine hundred thirty-seven".