97866869 has 2 divisors, whose sum is σ = 97866870. Its totient is φ = 97866868.

The previous prime is 97866809. The next prime is 97866871. The reversal of 97866869 is 96866879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96334225 + 1532644 = 9815^2 + 1238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97866869 is a prime.

It is a super-2 number, since 2×97866869² = 19155848095726322, which contains 22 as substring.

Together with 97866871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97866809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48933434 + 48933435.

It is an arithmetic number, because the mean of its divisors is an integer number (48933435).

Almost surely, 2^97866869 is an apocalyptic number.

It is an amenable number.

97866869 is a deficient number, since it is larger than the sum of its proper divisors (1).

97866869 is an equidigital number, since it uses as much as digits as its factorization.

97866869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 59.

The square root of 97866869 is about 9892.7685204901. The cubic root of 97866869 is about 460.8347618095.

The spelling of 97866869 in words is "ninety-seven million, eight hundred sixty-six thousand, eight hundred sixty-nine".