87530631 has 4 divisors (see below), whose sum is σ = 116707512. Its totient is φ = 58353752.

The previous prime is 87530629. The next prime is 87530659. The reversal of 87530631 is 13603578.

It is a happy number.

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 87530631 - 2¹ = 87530629 is a prime.

It is a super-2 number, since 2×87530631² = 15323222726516322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87530592 and 87530601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87530621) 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, 14588436 + ... + 14588441.

It is an arithmetic number, because the mean of its divisors is an integer number (29176878).

Almost surely, 2^87530631 is an apocalyptic number.

87530631 is a deficient number, since it is larger than the sum of its proper divisors (29176881).

87530631 is a wasteful number, since it uses less digits than its factorization.

87530631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29176880.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 87530631 is about 9355.7806194887. The cubic root of 87530631 is about 444.0037993750.

The spelling of 87530631 in words is "eighty-seven million, five hundred thirty thousand, six hundred thirty-one".