9631977431 has 4 divisors (see below), whose sum is σ = 9639854352. Its totient is φ = 9624100512.

The previous prime is 9631977373. The next prime is 9631977449. The reversal of 9631977431 is 1347791369.

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

It is a cyclic number.

It is not a de Polignac number, because 9631977431 - 2²² = 9627783127 is a prime.

It is a super-2 number, since 2×9631977431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9631977431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9631977451) 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, 3936626 + ... + 3939071.

It is an arithmetic number, because the mean of its divisors is an integer number (2409963588).

Almost surely, 2^9631977431 is an apocalyptic number.

9631977431 is a deficient number, since it is larger than the sum of its proper divisors (7876921).

9631977431 is a wasteful number, since it uses less digits than its factorization.

9631977431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876920.

The product of its digits is 857304, while the sum is 50.

The square root of 9631977431 is about 98142.6381905439. The cubic root of 9631977431 is about 2127.6743210458.

The spelling of 9631977431 in words is "nine billion, six hundred thirty-one million, nine hundred seventy-seven thousand, four hundred thirty-one".