87690423 has 4 divisors (see below), whose sum is σ = 116920568. Its totient is φ = 58460280.

The previous prime is 87690409. The next prime is 87690443. The reversal of 87690423 is 32409678.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 87690423 - 2⁹ = 87689911 is a prime.

It is a super-2 number, since 2×87690423² = 15379220571837858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87690443) 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, 14615068 + ... + 14615073.

It is an arithmetic number, because the mean of its divisors is an integer number (29230142).

Almost surely, 2^87690423 is an apocalyptic number.

87690423 is a deficient number, since it is larger than the sum of its proper divisors (29230145).

87690423 is a wasteful number, since it uses less digits than its factorization.

87690423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29230144.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 87690423 is about 9364.3164726530. The cubic root of 87690423 is about 444.2738196133.

The spelling of 87690423 in words is "eighty-seven million, six hundred ninety thousand, four hundred twenty-three".