87872399 has 2 divisors, whose sum is σ = 87872400. Its totient is φ = 87872398.

The previous prime is 87872387. The next prime is 87872401. The reversal of 87872399 is 99327878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87872399 - 2²⁰ = 86823823 is a prime.

Together with 87872401, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87872399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87872329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43936199 + 43936200.

It is an arithmetic number, because the mean of its divisors is an integer number (43936200).

Almost surely, 2^87872399 is an apocalyptic number.

87872399 is a deficient number, since it is larger than the sum of its proper divisors (1).

87872399 is an equidigital number, since it uses as much as digits as its factorization.

87872399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 53.

The square root of 87872399 is about 9374.0278962674. The cubic root of 87872399 is about 444.5809276922.

The spelling of 87872399 in words is "eighty-seven million, eight hundred seventy-two thousand, three hundred ninety-nine".