97897079899 has 2 divisors, whose sum is σ = 97897079900. Its totient is φ = 97897079898.

The previous prime is 97897079879. The next prime is 97897079927. The reversal of 97897079899 is 99897079879.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97897079899 - 2⁷ = 97897079771 is a prime.

It is not a weakly prime, because it can be changed into another prime (97897079809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48948539949 + 48948539950.

It is an arithmetic number, because the mean of its divisors is an integer number (48948539950).

Almost surely, 2^97897079899 is an apocalyptic number.

97897079899 is a deficient number, since it is larger than the sum of its proper divisors (1).

97897079899 is an equidigital number, since it uses as much as digits as its factorization.

97897079899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296243648, while the sum is 82.

The spelling of 97897079899 in words is "ninety-seven billion, eight hundred ninety-seven million, seventy-nine thousand, eight hundred ninety-nine".