97661279 has 2 divisors, whose sum is σ = 97661280. Its totient is φ = 97661278.

The previous prime is 97661237. The next prime is 97661297. The reversal of 97661279 is 97216679.

Together with next prime (97661297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97661279 - 2⁸ = 97661023 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97661479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48830639 + 48830640.

It is an arithmetic number, because the mean of its divisors is an integer number (48830640).

Almost surely, 2^97661279 is an apocalyptic number.

97661279 is a deficient number, since it is larger than the sum of its proper divisors (1).

97661279 is an equidigital number, since it uses as much as digits as its factorization.

97661279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 47.

The square root of 97661279 is about 9882.3721342601. The cubic root of 97661279 is about 460.5118420453.

The spelling of 97661279 in words is "ninety-seven million, six hundred sixty-one thousand, two hundred seventy-nine".