87597557 has 2 divisors, whose sum is σ = 87597558. Its totient is φ = 87597556.

The previous prime is 87597551. The next prime is 87597569. The reversal of 87597557 is 75579578.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81252196 + 6345361 = 9014^2 + 2519^2 .

It is a cyclic number.

It is not a de Polignac number, because 87597557 - 2⁴ = 87597541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87597499 and 87597508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87597551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43798778 + 43798779.

It is an arithmetic number, because the mean of its divisors is an integer number (43798779).

Almost surely, 2^87597557 is an apocalyptic number.

It is an amenable number.

87597557 is a deficient number, since it is larger than the sum of its proper divisors (1).

87597557 is an equidigital number, since it uses as much as digits as its factorization.

87597557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3087000, while the sum is 53.

The square root of 87597557 is about 9359.3566552408. The cubic root of 87597557 is about 444.1169324488.

The spelling of 87597557 in words is "eighty-seven million, five hundred ninety-seven thousand, five hundred fifty-seven".