87730637 has 4 divisors (see below), whose sum is σ = 87749376. Its totient is φ = 87711900.

The previous prime is 87730631. The next prime is 87730649. The reversal of 87730637 is 73603778.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 87730637 - 2²⁰ = 86682061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87730594 and 87730603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87730631) 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, 4358 + ... + 13944.

It is an arithmetic number, because the mean of its divisors is an integer number (21937344).

Almost surely, 2^87730637 is an apocalyptic number.

It is an amenable number.

87730637 is a deficient number, since it is larger than the sum of its proper divisors (18739).

87730637 is an equidigital number, since it uses as much as digits as its factorization.

87730637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18738.

The product of its (nonzero) digits is 148176, while the sum is 41.

The square root of 87730637 is about 9366.4634200962. The cubic root of 87730637 is about 444.3417224941.

The spelling of 87730637 in words is "eighty-seven million, seven hundred thirty thousand, six hundred thirty-seven".