97770025391 has 2 divisors, whose sum is σ = 97770025392. Its totient is φ = 97770025390.

The previous prime is 97770025369. The next prime is 97770025393. The reversal of 97770025391 is 19352007779.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97770025391 - 2²² = 97765831087 is a prime.

Together with 97770025393, 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 (97770025393) 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, 48885012695 + 48885012696.

It is an arithmetic number, because the mean of its divisors is an integer number (48885012696).

Almost surely, 2^97770025391 is an apocalyptic number.

97770025391 is a deficient number, since it is larger than the sum of its proper divisors (1).

97770025391 is an equidigital number, since it uses as much as digits as its factorization.

97770025391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 833490, while the sum is 50.

The spelling of 97770025391 in words is "ninety-seven billion, seven hundred seventy million, twenty-five thousand, three hundred ninety-one".