97772874973 has 2 divisors, whose sum is σ = 97772874974. Its totient is φ = 97772874972.

The previous prime is 97772874961. The next prime is 97772875001. The reversal of 97772874973 is 37947827779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96027473689 + 1745401284 = 309883^2 + 41778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97772874973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97772874943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48886437486 + 48886437487.

It is an arithmetic number, because the mean of its divisors is an integer number (48886437487).

Almost surely, 2^97772874973 is an apocalyptic number.

It is an amenable number.

97772874973 is a deficient number, since it is larger than the sum of its proper divisors (1).

97772874973 is an equidigital number, since it uses as much as digits as its factorization.

97772874973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 261382464, while the sum is 70.

The spelling of 97772874973 in words is "ninety-seven billion, seven hundred seventy-two million, eight hundred seventy-four thousand, nine hundred seventy-three".