9491387975 has 24 divisors (see below), whose sum is σ = 12028450368. Its totient is φ = 7426166400.

The previous prime is 9491387953. The next prime is 9491387987. The reversal of 9491387975 is 5797831949.

It is not a de Polignac number, because 9491387975 - 2²² = 9487193671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2607857 + ... + 2611493.

It is an arithmetic number, because the mean of its divisors is an integer number (501185432).

Almost surely, 2^9491387975 is an apocalyptic number.

9491387975 is a deficient number, since it is larger than the sum of its proper divisors (2537062393).

9491387975 is a wasteful number, since it uses less digits than its factorization.

9491387975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5915 (or 5910 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 62.

The square root of 9491387975 is about 97423.7546751304. The cubic root of 9491387975 is about 2117.2716158598.

The spelling of 9491387975 in words is "nine billion, four hundred ninety-one million, three hundred eighty-seven thousand, nine hundred seventy-five".