87921955 has 8 divisors (see below), whose sum is σ = 115097904. Its totient is φ = 63943200.

The previous prime is 87921947. The next prime is 87921959. The reversal of 87921955 is 55912978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87921955 - 2³ = 87921947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87921959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799236 + ... + 799345.

It is an arithmetic number, because the mean of its divisors is an integer number (14387238).

Almost surely, 2^87921955 is an apocalyptic number.

87921955 is a deficient number, since it is larger than the sum of its proper divisors (27175949).

87921955 is a wasteful number, since it uses less digits than its factorization.

87921955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598597.

The product of its digits is 226800, while the sum is 46.

The square root of 87921955 is about 9376.6707844522. The cubic root of 87921955 is about 444.6644863993.

The spelling of 87921955 in words is "eighty-seven million, nine hundred twenty-one thousand, nine hundred fifty-five".