97944991222457 has 2 divisors, whose sum is σ = 97944991222458. Its totient is φ = 97944991222456.

The previous prime is 97944991222439. The next prime is 97944991222459. The reversal of 97944991222457 is 75422219944979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91596460924816 + 6348530297641 = 9570604^2 + 2519629^2 .

It is a cyclic number.

It is not a de Polignac number, because 97944991222457 - 2⁴⁶ = 27576247044793 is a prime.

It is a super-2 number, since 2×97944991222457² (a number of 29 digits) contains 22 as substring.

Together with 97944991222459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97944991222459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48972495611228 + 48972495611229.

It is an arithmetic number, because the mean of its divisors is an integer number (48972495611229).

Almost surely, 2^{97944991222457} is an apocalyptic number.

It is an amenable number.

97944991222457 is a deficient number, since it is larger than the sum of its proper divisors (1).

97944991222457 is an equidigital number, since it uses as much as digits as its factorization.

97944991222457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 823011840, while the sum is 74.

The spelling of 97944991222457 in words is "ninety-seven trillion, nine hundred forty-four billion, nine hundred ninety-one million, two hundred twenty-two thousand, four hundred fifty-seven".