87137319 has 16 divisors (see below), whose sum is σ = 119266560. Its totient is φ = 56569920.

The previous prime is 87137243. The next prime is 87137327. The reversal of 87137319 is 91373178.

It is a happy number.

It is not a de Polignac number, because 87137319 - 2⁷ = 87137191 is a prime.

It is a super-2 number, since 2×87137319² = 15185824725015522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87137339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15454 + ... + 20324.

It is an arithmetic number, because the mean of its divisors is an integer number (7454160).

Almost surely, 2^87137319 is an apocalyptic number.

87137319 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

87137319 is a deficient number, since it is larger than the sum of its proper divisors (32129241).

87137319 is a wasteful number, since it uses less digits than its factorization.

87137319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5030.

The product of its digits is 31752, while the sum is 39.

The square root of 87137319 is about 9334.7372217969. The cubic root of 87137319 is about 443.3377687510.

The spelling of 87137319 in words is "eighty-seven million, one hundred thirty-seven thousand, three hundred nineteen".