97144387939 has 2 divisors, whose sum is σ = 97144387940. Its totient is φ = 97144387938.

The previous prime is 97144387933. The next prime is 97144387981. The reversal of 97144387939 is 93978344179.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97144387939 - 2³ = 97144387931 is a prime.

It is not a weakly prime, because it can be changed into another prime (97144387931) 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, 48572193969 + 48572193970.

It is an arithmetic number, because the mean of its divisors is an integer number (48572193970).

Almost surely, 2^97144387939 is an apocalyptic number.

97144387939 is a deficient number, since it is larger than the sum of its proper divisors (1).

97144387939 is an equidigital number, since it uses as much as digits as its factorization.

97144387939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41150592, while the sum is 64.

The spelling of 97144387939 in words is "ninety-seven billion, one hundred forty-four million, three hundred eighty-seven thousand, nine hundred thirty-nine".