97775999 has 2 divisors, whose sum is σ = 97776000. Its totient is φ = 97775998.

The previous prime is 97775983. The next prime is 97776001. The reversal of 97775999 is 99957779.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97775999 - 2⁴ = 97775983 is a prime.

Together with 97776001, 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 (97775929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48887999 + 48888000.

It is an arithmetic number, because the mean of its divisors is an integer number (48888000).

Almost surely, 2^97775999 is an apocalyptic number.

97775999 is a deficient number, since it is larger than the sum of its proper divisors (1).

97775999 is an equidigital number, since it uses as much as digits as its factorization.

97775999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11252115, while the sum is 62.

The square root of 97775999 is about 9888.1747051718. The cubic root of 97775999 is about 460.6920883231.

The spelling of 97775999 in words is "ninety-seven million, seven hundred seventy-five thousand, nine hundred ninety-nine".