31964791369 has 9 divisors (see below), whose sum is σ = 37184988711. Its totient is φ = 27397319880.

The previous prime is 31964791367. The next prime is 31964791373. The reversal of 31964791369 is 96319746913.

The square root of 31964791369 is 178787.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 14313011769 + 17651779600 = 119637^2 + 132860^2 .

It is not a de Polignac number, because 31964791369 - 2¹ = 31964791367 is a prime.

It is a super-2 number, since 2×31964791369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31964791367) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1238739 + ... + 1264279.

Almost surely, 2^31964791369 is an apocalyptic number.

31964791369 is the 178787-th square number.

31964791369 is the 89394-th centered octagonal number.

It is an amenable number.

31964791369 is a deficient number, since it is larger than the sum of its proper divisors (5220197342).

31964791369 is an frugal number, since it uses more digits than its factorization.

31964791369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51096 (or 25548 counting only the distinct ones).

The product of its digits is 6613488, while the sum is 58.

The spelling of 31964791369 in words is "thirty-one billion, nine hundred sixty-four million, seven hundred ninety-one thousand, three hundred sixty-nine".