3129607397 has 4 divisors (see below), whose sum is σ = 3576694176. Its totient is φ = 2682520620.

The previous prime is 3129607391. The next prime is 3129607399. The reversal of 3129607397 is 7937069213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7937069213 = 23059 ⋅344207.

It is a cyclic number.

It is not a de Polignac number, because 3129607397 - 2¹⁶ = 3129541861 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 (3129607391) 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, 223543379 + ... + 223543392.

It is an arithmetic number, because the mean of its divisors is an integer number (894173544).

Almost surely, 2^3129607397 is an apocalyptic number.

It is an amenable number.

3129607397 is a deficient number, since it is larger than the sum of its proper divisors (447086779).

3129607397 is an equidigital number, since it uses as much as digits as its factorization.

3129607397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447086778.

The product of its (nonzero) digits is 428652, while the sum is 47.

The square root of 3129607397 is about 55942.8940706503. The cubic root of 3129607397 is about 1462.7270288412.

The spelling of 3129607397 in words is "three billion, one hundred twenty-nine million, six hundred seven thousand, three hundred ninety-seven".