87123107 has 2 divisors, whose sum is σ = 87123108. Its totient is φ = 87123106.

The previous prime is 87123097. The next prime is 87123133. The reversal of 87123107 is 70132178.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87123107 is a prime.

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 87123107.

It is not a weakly prime, because it can be changed into another prime (87123137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43561553 + 43561554.

It is an arithmetic number, because the mean of its divisors is an integer number (43561554).

Almost surely, 2^87123107 is an apocalyptic number.

87123107 is a deficient number, since it is larger than the sum of its proper divisors (1).

87123107 is an equidigital number, since it uses as much as digits as its factorization.

87123107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 87123107 is about 9333.9759481156. The cubic root of 87123107 is about 443.3136648079.

The spelling of 87123107 in words is "eighty-seven million, one hundred twenty-three thousand, one hundred seven".