87505199 has 2 divisors, whose sum is σ = 87505200. Its totient is φ = 87505198.

The previous prime is 87505189. The next prime is 87505213. The reversal of 87505199 is 99150578.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87505199 - 2⁸ = 87504943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87505169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43752599 + 43752600.

It is an arithmetic number, because the mean of its divisors is an integer number (43752600).

Almost surely, 2^87505199 is an apocalyptic number.

87505199 is a deficient number, since it is larger than the sum of its proper divisors (1).

87505199 is an equidigital number, since it uses as much as digits as its factorization.

87505199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 87505199 is about 9354.4213610463. The cubic root of 87505199 is about 443.9607934836.

The spelling of 87505199 in words is "eighty-seven million, five hundred five thousand, one hundred ninety-nine".