9139923531 has 12 divisors (see below), whose sum is σ = 13203356400. Its totient is φ = 6092707920.

The previous prime is 9139923509. The next prime is 9139923553. The reversal of 9139923531 is 1353299319.

It is a happy number.

9139923531 is a `hidden beast` number, since 9 + 1 + 3 + 99 + 23 + 531 = 666.

It is an interprime number because it is at equal distance from previous prime (9139923509) and next prime (9139923553).

It is not a de Polignac number, because 9139923531 - 2⁹ = 9139923019 is a prime.

It is a super-2 number, since 2×9139923531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9139923431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67546 + ... + 151136.

It is an arithmetic number, because the mean of its divisors is an integer number (1100279700).

Almost surely, 2^9139923531 is an apocalyptic number.

9139923531 is a deficient number, since it is larger than the sum of its proper divisors (4063432869).

9139923531 is a wasteful number, since it uses less digits than its factorization.

9139923531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95746 (or 95743 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 9139923531 is about 95602.9472924345. The cubic root of 9139923531 is about 2090.8081649034.

The spelling of 9139923531 in words is "nine billion, one hundred thirty-nine million, nine hundred twenty-three thousand, five hundred thirty-one".