397774795387 has 2 divisors, whose sum is σ = 397774795388. Its totient is φ = 397774795386.

The previous prime is 397774795321. The next prime is 397774795421. The reversal of 397774795387 is 783597477793.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397774795387 is a prime.

It is not a weakly prime, because it can be changed into another prime (397774795687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198887397693 + 198887397694.

It is an arithmetic number, because the mean of its divisors is an integer number (198887397694).

Almost surely, 2^397774795387 is an apocalyptic number.

397774795387 is a deficient number, since it is larger than the sum of its proper divisors (1).

397774795387 is an equidigital number, since it uses as much as digits as its factorization.

397774795387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1960368480, while the sum is 76.

The spelling of 397774795387 in words is "three hundred ninety-seven billion, seven hundred seventy-four million, seven hundred ninety-five thousand, three hundred eighty-seven".