87790929 has 8 divisors (see below), whose sum is σ = 117103200. Its totient is φ = 58502976.

The previous prime is 87790921. The next prime is 87790939. The reversal of 87790929 is 92909778.

It is a happy number.

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

It is not a de Polignac number, because 87790929 - 2³ = 87790921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87790921) 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, 5497 + ... + 14345.

It is an arithmetic number, because the mean of its divisors is an integer number (14637900).

Almost surely, 2^87790929 is an apocalyptic number.

It is an amenable number.

87790929 is a deficient number, since it is larger than the sum of its proper divisors (29312271).

87790929 is a wasteful number, since it uses less digits than its factorization.

87790929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12159.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 87790929 is about 9369.6813713167. The cubic root of 87790929 is about 444.4434889817.

It can be divided in two parts, 877 and 90929, that added together give a triangular number (91806 = T₄₂₈).

The spelling of 87790929 in words is "eighty-seven million, seven hundred ninety thousand, nine hundred twenty-nine".