3137345621 has 8 divisors (see below), whose sum is σ = 3169349400. Its totient is φ = 3105474048.

The previous prime is 3137345579. The next prime is 3137345633. The reversal of 3137345621 is 1265437313.

It can be written as a sum of positive squares in 4 ways, for example, as 1973580625 + 1163764996 = 44425^2 + 34114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3137345621 - 2²² = 3133151317 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 (3137345681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15005 + ... + 80621.

It is an arithmetic number, because the mean of its divisors is an integer number (396168675).

Almost surely, 2^3137345621 is an apocalyptic number.

It is an amenable number.

3137345621 is a deficient number, since it is larger than the sum of its proper divisors (32003779).

3137345621 is a wasteful number, since it uses less digits than its factorization.

3137345621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66103.

The product of its digits is 45360, while the sum is 35.

The square root of 3137345621 is about 56012.0131846732. The cubic root of 3137345621 is about 1463.9316094554.

The spelling of 3137345621 in words is "three billion, one hundred thirty-seven million, three hundred forty-five thousand, six hundred twenty-one".