97111997 has 2 divisors, whose sum is σ = 97111998. Its totient is φ = 97111996.

The previous prime is 97111991. The next prime is 97112027. The reversal of 97111997 is 79911179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68873401 + 28238596 = 8299^2 + 5314^2 .

It is a cyclic number.

It is not a de Polignac number, because 97111997 - 2¹⁴ = 97095613 is a prime.

It is a super-2 number, since 2×97111997² = 18861479922656018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97111991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48555998 + 48555999.

It is an arithmetic number, because the mean of its divisors is an integer number (48555999).

Almost surely, 2^97111997 is an apocalyptic number.

It is an amenable number.

97111997 is a deficient number, since it is larger than the sum of its proper divisors (1).

97111997 is an equidigital number, since it uses as much as digits as its factorization.

97111997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35721, while the sum is 44.

The square root of 97111997 is about 9854.5419477518. The cubic root of 97111997 is about 459.6468571904.

The spelling of 97111997 in words is "ninety-seven million, one hundred eleven thousand, nine hundred ninety-seven".