87621154 has 4 divisors (see below), whose sum is σ = 131431734. Its totient is φ = 43810576.

The previous prime is 87621133. The next prime is 87621161. The reversal of 87621154 is 45112678.

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., 86769225 + 851929 = 9315^2 + 923^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21905287 + ... + 21905290.

Almost surely, 2^87621154 is an apocalyptic number.

87621154 is a deficient number, since it is larger than the sum of its proper divisors (43810580).

87621154 is a wasteful number, since it uses less digits than its factorization.

87621154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43810579.

The product of its digits is 13440, while the sum is 34.

The square root of 87621154 is about 9360.6171805068. The cubic root of 87621154 is about 444.1568075578.

The spelling of 87621154 in words is "eighty-seven million, six hundred twenty-one thousand, one hundred fifty-four".