397006777 has 8 divisors (see below), whose sum is σ = 403159400. Its totient is φ = 390873600.

The previous prime is 397006759. The next prime is 397006793. The reversal of 397006777 is 777600793.

It can be written as a sum of positive squares in 4 ways, for example, as 202236841 + 194769936 = 14221^2 + 13956^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 397006777 - 2²³ = 388618169 is a prime.

It is a super-2 number, since 2×397006777² = 315228761967855458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397006717) 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 in 7 ways as a sum of consecutive naturals, for example, 39349 + ... + 48397.

It is an arithmetic number, because the mean of its divisors is an integer number (50394925).

Almost surely, 2^397006777 is an apocalyptic number.

It is an amenable number.

397006777 is a deficient number, since it is larger than the sum of its proper divisors (6152623).

397006777 is an equidigital number, since it uses as much as digits as its factorization.

397006777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9723.

The product of its (nonzero) digits is 388962, while the sum is 46.

The square root of 397006777 is about 19925.0289083856. The cubic root of 397006777 is about 734.9638416815.

The spelling of 397006777 in words is "three hundred ninety-seven million, six thousand, seven hundred seventy-seven".