397284577 has 8 divisors (see below), whose sum is σ = 432023976. Its totient is φ = 363808512.

The previous prime is 397284571. The next prime is 397284631. The reversal of 397284577 is 775482793.

It can be written as a sum of positive squares in 4 ways, for example, as 224730081 + 172554496 = 14991^2 + 13136^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397284577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397284571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315178 + ... + 316435.

It is an arithmetic number, because the mean of its divisors is an integer number (54002997).

Almost surely, 2^397284577 is an apocalyptic number.

397284577 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

397284577 is a deficient number, since it is larger than the sum of its proper divisors (34739399).

397284577 is a wasteful number, since it uses less digits than its factorization.

397284577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631667.

The product of its digits is 2963520, while the sum is 52.

The square root of 397284577 is about 19931.9988209913. The cubic root of 397284577 is about 735.1352286394.

The spelling of 397284577 in words is "three hundred ninety-seven million, two hundred eighty-four thousand, five hundred seventy-seven".