87290873 has 2 divisors, whose sum is σ = 87290874. Its totient is φ = 87290872.

The previous prime is 87290843. The next prime is 87290909. The reversal of 87290873 is 37809278.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48888064 + 38402809 = 6992^2 + 6197^2 .

It is a cyclic number.

It is not a de Polignac number, because 87290873 - 2⁶ = 87290809 is a prime.

It is not a weakly prime, because it can be changed into another prime (87290803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43645436 + 43645437.

It is an arithmetic number, because the mean of its divisors is an integer number (43645437).

Almost surely, 2^87290873 is an apocalyptic number.

It is an amenable number.

87290873 is a deficient number, since it is larger than the sum of its proper divisors (1).

87290873 is an equidigital number, since it uses as much as digits as its factorization.

87290873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 87290873 is about 9342.9584714907. The cubic root of 87290873 is about 443.5980335815.

The spelling of 87290873 in words is "eighty-seven million, two hundred ninety thousand, eight hundred seventy-three".