87557474 has 4 divisors (see below), whose sum is σ = 131336214. Its totient is φ = 43778736.

The previous prime is 87557471. The next prime is 87557513. The reversal of 87557474 is 47475578.

It is a happy number.

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., 47955625 + 39601849 = 6925^2 + 6293^2 .

It is a super-2 number, since 2×87557474² = 15332622506521352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87557471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21889367 + ... + 21889370.

Almost surely, 2^87557474 is an apocalyptic number.

87557474 is a deficient number, since it is larger than the sum of its proper divisors (43778740).

87557474 is a wasteful number, since it uses less digits than its factorization.

87557474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43778739.

The product of its digits is 1097600, while the sum is 47.

The square root of 87557474 is about 9357.2150771477. The cubic root of 87557474 is about 444.0491822531.

The spelling of 87557474 in words is "eighty-seven million, five hundred fifty-seven thousand, four hundred seventy-four".