87723555 has 16 divisors (see below), whose sum is σ = 141722880. Its totient is φ = 46330848.

The previous prime is 87723523. The next prime is 87723557. The reversal of 87723555 is 55532778.

It is not a de Polignac number, because 87723555 - 2⁵ = 87723523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87723557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26845 + ... + 29934.

It is an arithmetic number, because the mean of its divisors is an integer number (8857680).

Almost surely, 2^87723555 is an apocalyptic number.

87723555 is a deficient number, since it is larger than the sum of its proper divisors (53999325).

87723555 is a wasteful number, since it uses less digits than its factorization.

87723555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56890.

The product of its digits is 294000, while the sum is 42.

The square root of 87723555 is about 9366.0853615585. The cubic root of 87723555 is about 444.3297657711.

The spelling of 87723555 in words is "eighty-seven million, seven hundred twenty-three thousand, five hundred fifty-five".