397824073 has 4 divisors (see below), whose sum is σ = 397938688. Its totient is φ = 397709460.

The previous prime is 397824043. The next prime is 397824101. The reversal of 397824073 is 370428793.

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 397824073 - 2⁵ = 397824041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397824043) 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, 51933 + ... + 59098.

It is an arithmetic number, because the mean of its divisors is an integer number (99484672).

Almost surely, 2^397824073 is an apocalyptic number.

It is an amenable number.

397824073 is a deficient number, since it is larger than the sum of its proper divisors (114615).

397824073 is a wasteful number, since it uses less digits than its factorization.

397824073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114614.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 397824073 is about 19945.5276440610. The cubic root of 397824073 is about 735.4678391914.

The spelling of 397824073 in words is "three hundred ninety-seven million, eight hundred twenty-four thousand, seventy-three".