87658169 has 4 divisors (see below), whose sum is σ = 87741696. Its totient is φ = 87574644.

The previous prime is 87658157. The next prime is 87658183. The reversal of 87658169 is 96185678.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87658169 is a prime.

It is a super-2 number, since 2×87658169² = 15367909184865122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87658189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40169 + ... + 42294.

It is an arithmetic number, because the mean of its divisors is an integer number (21935424).

Almost surely, 2^87658169 is an apocalyptic number.

It is an amenable number.

87658169 is a deficient number, since it is larger than the sum of its proper divisors (83527).

87658169 is a wasteful number, since it uses less digits than its factorization.

87658169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83526.

The product of its digits is 725760, while the sum is 50.

The square root of 87658169 is about 9362.5941383785. The cubic root of 87658169 is about 444.2193424935.

The spelling of 87658169 in words is "eighty-seven million, six hundred fifty-eight thousand, one hundred sixty-nine".