87389331 has 8 divisors (see below), whose sum is σ = 116698560. Its totient is φ = 58169832.

The previous prime is 87389321. The next prime is 87389339. The reversal of 87389331 is 13398378.

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

It is not a de Polignac number, because 87389331 - 2¹⁰ = 87388307 is a prime.

It is a super-2 number, since 2×87389331² = 15273790345255122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87389339) 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, 20125 + ... + 24078.

It is an arithmetic number, because the mean of its divisors is an integer number (14587320).

Almost surely, 2^87389331 is an apocalyptic number.

87389331 is a deficient number, since it is larger than the sum of its proper divisors (29309229).

87389331 is a wasteful number, since it uses less digits than its factorization.

87389331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44865.

The product of its digits is 108864, while the sum is 42.

The square root of 87389331 is about 9348.2260884084. The cubic root of 87389331 is about 443.7647534340.

The spelling of 87389331 in words is "eighty-seven million, three hundred eighty-nine thousand, three hundred thirty-one".