87522073 has 2 divisors, whose sum is σ = 87522074. Its totient is φ = 87522072.

The previous prime is 87522053. The next prime is 87522079. The reversal of 87522073 is 37022578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85525504 + 1996569 = 9248^2 + 1413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87522073 is a prime.

It is a super-2 number, since 2×87522073² = 15320226524434658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87522079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43761036 + 43761037.

It is an arithmetic number, because the mean of its divisors is an integer number (43761037).

Almost surely, 2^87522073 is an apocalyptic number.

It is an amenable number.

87522073 is a deficient number, since it is larger than the sum of its proper divisors (1).

87522073 is an equidigital number, since it uses as much as digits as its factorization.

87522073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 87522073 is about 9355.3232440146. The cubic root of 87522073 is about 443.9893285994.

The spelling of 87522073 in words is "eighty-seven million, five hundred twenty-two thousand, seventy-three".