197953902137 has 2 divisors, whose sum is σ = 197953902138. Its totient is φ = 197953902136.

The previous prime is 197953902127. The next prime is 197953902143. The reversal of 197953902137 is 731209359791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184353444496 + 13600457641 = 429364^2 + 116621^2 .

It is a cyclic number.

It is not a de Polignac number, because 197953902137 - 2⁴ = 197953902121 is a prime.

It is not a weakly prime, because it can be changed into another prime (197953902127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98976951068 + 98976951069.

It is an arithmetic number, because the mean of its divisors is an integer number (98976951069).

Almost surely, 2^197953902137 is an apocalyptic number.

It is an amenable number.

197953902137 is a deficient number, since it is larger than the sum of its proper divisors (1).

197953902137 is an equidigital number, since it uses as much as digits as its factorization.

197953902137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3214890, while the sum is 56.

The spelling of 197953902137 in words is "one hundred ninety-seven billion, nine hundred fifty-three million, nine hundred two thousand, one hundred thirty-seven".