87872737 has 2 divisors, whose sum is σ = 87872738. Its totient is φ = 87872736.

The previous prime is 87872723. The next prime is 87872747. The reversal of 87872737 is 73727878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78163281 + 9709456 = 8841^2 + 3116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87872737 is a prime.

It is not a weakly prime, because it can be changed into another prime (87872747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43936368 + 43936369.

It is an arithmetic number, because the mean of its divisors is an integer number (43936369).

Almost surely, 2^87872737 is an apocalyptic number.

It is an amenable number.

87872737 is a deficient number, since it is larger than the sum of its proper divisors (1).

87872737 is an equidigital number, since it uses as much as digits as its factorization.

87872737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 921984, while the sum is 49.

The square root of 87872737 is about 9374.0459247862. The cubic root of 87872737 is about 444.5814977164.

The spelling of 87872737 in words is "eighty-seven million, eight hundred seventy-two thousand, seven hundred thirty-seven".