397912976953 has 2 divisors, whose sum is σ = 397912976954. Its totient is φ = 397912976952.

The previous prime is 397912976941. The next prime is 397912976987. The reversal of 397912976953 is 359679219793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366040730169 + 31872246784 = 605013^2 + 178528^2 .

It is a cyclic number.

It is not a de Polignac number, because 397912976953 - 2²¹ = 397910879801 is a prime.

It is not a weakly prime, because it can be changed into another prime (397912976753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198956488476 + 198956488477.

It is an arithmetic number, because the mean of its divisors is an integer number (198956488477).

Almost surely, 2^397912976953 is an apocalyptic number.

It is an amenable number.

397912976953 is a deficient number, since it is larger than the sum of its proper divisors (1).

397912976953 is an equidigital number, since it uses as much as digits as its factorization.

397912976953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 173604060, while the sum is 70.

The spelling of 397912976953 in words is "three hundred ninety-seven billion, nine hundred twelve million, nine hundred seventy-six thousand, nine hundred fifty-three".