87790530231 has 6 divisors (see below), whose sum is σ = 126808543680. Its totient is φ = 58527020148.

The previous prime is 87790530143. The next prime is 87790530239. The reversal of 87790530231 is 13203509778.

It is a happy number.

87790530231 is a `hidden beast` number, since 8 + 7 + 7 + 90 + 530 + 23 + 1 = 666.

It is not a de Polignac number, because 87790530231 - 2¹⁰ = 87790529207 is a prime.

It is a super-2 number, since 2×87790530231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87790530239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4877251671 + ... + 4877251688.

It is an arithmetic number, because the mean of its divisors is an integer number (21134757280).

Almost surely, 2^87790530231 is an apocalyptic number.

87790530231 is a deficient number, since it is larger than the sum of its proper divisors (39018013449).

87790530231 is a wasteful number, since it uses less digits than its factorization.

87790530231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9754503365 (or 9754503362 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 87790530231 in words is "eighty-seven billion, seven hundred ninety million, five hundred thirty thousand, two hundred thirty-one".