97859251397 has 2 divisors, whose sum is σ = 97859251398. Its totient is φ = 97859251396.

The previous prime is 97859251363. The next prime is 97859251417. The reversal of 97859251397 is 79315295879.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96804365956 + 1054885441 = 311134^2 + 32479^2 .

It is a cyclic number.

It is not a de Polignac number, because 97859251397 - 2⁸ = 97859251141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97859251097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48929625698 + 48929625699.

It is an arithmetic number, because the mean of its divisors is an integer number (48929625699).

Almost surely, 2^97859251397 is an apocalyptic number.

It is an amenable number.

97859251397 is a deficient number, since it is larger than the sum of its proper divisors (1).

97859251397 is an equidigital number, since it uses as much as digits as its factorization.

97859251397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42865200, while the sum is 65.

The spelling of 97859251397 in words is "ninety-seven billion, eight hundred fifty-nine million, two hundred fifty-one thousand, three hundred ninety-seven".