87579197 has 2 divisors, whose sum is σ = 87579198. Its totient is φ = 87579196.

The previous prime is 87579169. The next prime is 87579209. The reversal of 87579197 is 79197578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82973881 + 4605316 = 9109^2 + 2146^2 .

It is a cyclic number.

It is not a de Polignac number, because 87579197 - 2¹⁸ = 87317053 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 (87579697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43789598 + 43789599.

It is an arithmetic number, because the mean of its divisors is an integer number (43789599).

Almost surely, 2^87579197 is an apocalyptic number.

It is an amenable number.

87579197 is a deficient number, since it is larger than the sum of its proper divisors (1).

87579197 is an equidigital number, since it uses as much as digits as its factorization.

87579197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1111320, while the sum is 53.

The square root of 87579197 is about 9358.3757671938. The cubic root of 87579197 is about 444.0859020681.

The spelling of 87579197 in words is "eighty-seven million, five hundred seventy-nine thousand, one hundred ninety-seven".