87047957 has 2 divisors, whose sum is σ = 87047958. Its totient is φ = 87047956.

The previous prime is 87047921. The next prime is 87047977. The reversal of 87047957 is 75974078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77598481 + 9449476 = 8809^2 + 3074^2 .

It is a cyclic number.

It is not a de Polignac number, because 87047957 - 2¹⁰ = 87046933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87047977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43523978 + 43523979.

It is an arithmetic number, because the mean of its divisors is an integer number (43523979).

Almost surely, 2^87047957 is an apocalyptic number.

It is an amenable number.

87047957 is a deficient number, since it is larger than the sum of its proper divisors (1).

87047957 is an equidigital number, since it uses as much as digits as its factorization.

87047957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 87047957 is about 9329.9494639575. The cubic root of 87047957 is about 443.1861647431.

It can be divided in two parts, 8704 and 7957, that added together give a palindrome (16661).

The spelling of 87047957 in words is "eighty-seven million, forty-seven thousand, nine hundred fifty-seven".