87161597 has 2 divisors, whose sum is σ = 87161598. Its totient is φ = 87161596.

The previous prime is 87161551. The next prime is 87161621. The reversal of 87161597 is 79516178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81830116 + 5331481 = 9046^2 + 2309^2 .

It is a cyclic number.

It is not a de Polignac number, because 87161597 - 2¹² = 87157501 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 (87161297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43580798 + 43580799.

It is an arithmetic number, because the mean of its divisors is an integer number (43580799).

Almost surely, 2^87161597 is an apocalyptic number.

It is an amenable number.

87161597 is a deficient number, since it is larger than the sum of its proper divisors (1).

87161597 is an equidigital number, since it uses as much as digits as its factorization.

87161597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 44.

The square root of 87161597 is about 9336.0375427694. The cubic root of 87161597 is about 443.3789388452.

The spelling of 87161597 in words is "eighty-seven million, one hundred sixty-one thousand, five hundred ninety-seven".