87125447 has 2 divisors, whose sum is σ = 87125448. Its totient is φ = 87125446.

The previous prime is 87125443. The next prime is 87125453. The reversal of 87125447 is 74452178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87125447 - 2² = 87125443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87125447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87125443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43562723 + 43562724.

It is an arithmetic number, because the mean of its divisors is an integer number (43562724).

Almost surely, 2^87125447 is an apocalyptic number.

87125447 is a deficient number, since it is larger than the sum of its proper divisors (1).

87125447 is an equidigital number, since it uses as much as digits as its factorization.

87125447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 38.

The square root of 87125447 is about 9334.1012957863. The cubic root of 87125447 is about 443.3176336926.

The spelling of 87125447 in words is "eighty-seven million, one hundred twenty-five thousand, four hundred forty-seven".