87131463074 has 4 divisors (see below), whose sum is σ = 130697194614. Its totient is φ = 43565731536.

The previous prime is 87131463047. The next prime is 87131463079. The reversal of 87131463074 is 47036413178.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 82143572449 + 4987890625 = 286607^2 + 70625^2 .

It is not an unprimeable number, because it can be changed into a prime (87131463079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21782865767 + ... + 21782865770.

Almost surely, 2^87131463074 is an apocalyptic number.

87131463074 is a deficient number, since it is larger than the sum of its proper divisors (43565731540).

87131463074 is a wasteful number, since it uses less digits than its factorization.

87131463074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43565731539.

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 87131463074 in words is "eighty-seven billion, one hundred thirty-one million, four hundred sixty-three thousand, seventy-four".