397424401 has 4 divisors (see below), whose sum is σ = 433553904. Its totient is φ = 361294900.

The previous prime is 397424399. The next prime is 397424407. The reversal of 397424401 is 104424793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 397424401 - 2¹ = 397424399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397424407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18064735 + ... + 18064756.

It is an arithmetic number, because the mean of its divisors is an integer number (108388476).

Almost surely, 2^397424401 is an apocalyptic number.

It is an amenable number.

397424401 is a deficient number, since it is larger than the sum of its proper divisors (36129503).

397424401 is a wasteful number, since it uses less digits than its factorization.

397424401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36129502.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 397424401 is about 19935.5060382224. The cubic root of 397424401 is about 735.2214619489.

The spelling of 397424401 in words is "three hundred ninety-seven million, four hundred twenty-four thousand, four hundred one".