397995401 has 6 divisors (see below), whose sum is σ = 407468250. Its totient is φ = 388737888.

The previous prime is 397995373. The next prime is 397995407. The reversal of 397995401 is 104599793.

It can be written as a sum of positive squares in only one way, i.e., 386161801 + 11833600 = 19651^2 + 3440^2 .

It is a de Polignac number, because none of the positive numbers 2^k-397995401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397995407) 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 in 5 ways as a sum of consecutive naturals, for example, 105776 + ... + 109473.

It is an arithmetic number, because the mean of its divisors is an integer number (67911375).

Almost surely, 2^397995401 is an apocalyptic number.

It is an amenable number.

397995401 is a deficient number, since it is larger than the sum of its proper divisors (9472849).

397995401 is an equidigital number, since it uses as much as digits as its factorization.

397995401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215335 (or 215292 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 397995401 is about 19949.8220794071. The cubic root of 397995401 is about 735.5734035670.

The spelling of 397995401 in words is "three hundred ninety-seven million, nine hundred ninety-five thousand, four hundred one".