8531393997 has 8 divisors (see below), whose sum is σ = 13000219456. Its totient is φ = 4875082272.

The previous prime is 8531393989. The next prime is 8531394043. The reversal of 8531393997 is 7993931358.

It is a happy number.

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

It is not a de Polignac number, because 8531393997 - 2³ = 8531393989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8531392997) 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, 203128408 + ... + 203128449.

It is an arithmetic number, because the mean of its divisors is an integer number (1625027432).

Almost surely, 2^8531393997 is an apocalyptic number.

It is an amenable number.

8531393997 is a deficient number, since it is larger than the sum of its proper divisors (4468825459).

8531393997 is a wasteful number, since it uses less digits than its factorization.

8531393997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406256867.

The product of its digits is 5511240, while the sum is 57.

The square root of 8531393997 is about 92365.5455080519. The cubic root of 8531393997 is about 2043.3370025993.

The spelling of 8531393997 in words is "eight billion, five hundred thirty-one million, three hundred ninety-three thousand, nine hundred ninety-seven".