397667377 has 2 divisors, whose sum is σ = 397667378. Its totient is φ = 397667376.

The previous prime is 397667371. The next prime is 397667381. The reversal of 397667377 is 773766793.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383219776 + 14447601 = 19576^2 + 3801^2 .

It is a cyclic number.

It is not a de Polignac number, because 397667377 - 2¹¹ = 397665329 is a prime.

It is not a weakly prime, because it can be changed into another prime (397667371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198833688 + 198833689.

It is an arithmetic number, because the mean of its divisors is an integer number (198833689).

Almost surely, 2^397667377 is an apocalyptic number.

It is an amenable number.

397667377 is a deficient number, since it is larger than the sum of its proper divisors (1).

397667377 is an equidigital number, since it uses as much as digits as its factorization.

397667377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7001316, while the sum is 55.

The square root of 397667377 is about 19941.5991585429. The cubic root of 397667377 is about 735.3712638367.

The spelling of 397667377 in words is "three hundred ninety-seven million, six hundred sixty-seven thousand, three hundred seventy-seven".