97587881 has 2 divisors, whose sum is σ = 97587882. Its totient is φ = 97587880.

The previous prime is 97587863. The next prime is 97587887. The reversal of 97587881 is 18878579.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67502656 + 30085225 = 8216^2 + 5485^2 .

It is an emirp because it is prime and its reverse (18878579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97587881 - 2¹⁰ = 97586857 is a prime.

It is a super-2 number, since 2×97587881² = 19046789036140322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (97587887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48793940 + 48793941.

It is an arithmetic number, because the mean of its divisors is an integer number (48793941).

Almost surely, 2^97587881 is an apocalyptic number.

It is an amenable number.

97587881 is a deficient number, since it is larger than the sum of its proper divisors (1).

97587881 is an equidigital number, since it uses as much as digits as its factorization.

97587881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 53.

The square root of 97587881 is about 9878.6578541824. The cubic root of 97587881 is about 460.3964461935.

The spelling of 97587881 in words is "ninety-seven million, five hundred eighty-seven thousand, eight hundred eighty-one".