87790651 has 16 divisors (see below), whose sum is σ = 96868800. Its totient is φ = 79067520.

The previous prime is 87790597. The next prime is 87790657. The reversal of 87790651 is 15609778.

It is a cyclic number.

It is not a de Polignac number, because 87790651 - 2⁹ = 87790139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87790598 and 87790607.

It is not an unprimeable number, because it can be changed into a prime (87790657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117786 + ... + 118528.

It is an arithmetic number, because the mean of its divisors is an integer number (6054300).

Almost surely, 2^87790651 is an apocalyptic number.

87790651 is a deficient number, since it is larger than the sum of its proper divisors (9078149).

87790651 is a wasteful number, since it uses less digits than its factorization.

87790651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 87790651 is about 9369.6665362221. Note that the first 3 decimals coincide. The cubic root of 87790651 is about 444.4430198542.

The spelling of 87790651 in words is "eighty-seven million, seven hundred ninety thousand, six hundred fifty-one".