87390079 has 24 divisors (see below), whose sum is σ = 106498800. Its totient is φ = 71406720.

The previous prime is 87390073. The next prime is 87390103. The reversal of 87390079 is 97009378.

It is not a de Polignac number, because 87390079 - 2³ = 87390071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87390071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126124 + ... + 126814.

It is an arithmetic number, because the mean of its divisors is an integer number (4437450).

Almost surely, 2^87390079 is an apocalyptic number.

87390079 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

87390079 is a deficient number, since it is larger than the sum of its proper divisors (19108721).

87390079 is a wasteful number, since it uses less digits than its factorization.

87390079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 87390079 is about 9348.2660959132. The cubic root of 87390079 is about 443.7660195500.

The spelling of 87390079 in words is "eighty-seven million, three hundred ninety thousand, seventy-nine".