87242319 has 16 divisors (see below), whose sum is σ = 136051200. Its totient is φ = 55100088.

The previous prime is 87242299. The next prime is 87242321. The reversal of 87242319 is 91324278.

It is not a de Polignac number, because 87242319 - 2⁷ = 87242191 is a prime.

It is a super-2 number, since 2×87242319² = 15222444448995522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87242119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84519 + ... + 85544.

It is an arithmetic number, because the mean of its divisors is an integer number (8503200).

Almost surely, 2^87242319 is an apocalyptic number.

87242319 is a deficient number, since it is larger than the sum of its proper divisors (48808881).

87242319 is a wasteful number, since it uses less digits than its factorization.

87242319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170091 (or 170085 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 87242319 is about 9340.3596825818. The cubic root of 87242319 is about 443.5157704809.

The spelling of 87242319 in words is "eighty-seven million, two hundred forty-two thousand, three hundred nineteen".