397040369 has 4 divisors (see below), whose sum is σ = 433134960. Its totient is φ = 360945780.

The previous prime is 397040341. The next prime is 397040381. The reversal of 397040369 is 963040793.

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 397040369 - 2¹² = 397036273 is a prime.

It is a super-2 number, since 2×397040369² = 315282109231312322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397040309) 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 3 ways as a sum of consecutive naturals, for example, 18047279 + ... + 18047300.

It is an arithmetic number, because the mean of its divisors is an integer number (108283740).

Almost surely, 2^397040369 is an apocalyptic number.

It is an amenable number.

397040369 is a deficient number, since it is larger than the sum of its proper divisors (36094591).

397040369 is a wasteful number, since it uses less digits than its factorization.

397040369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36094590.

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 397040369 is about 19925.8718504361. The cubic root of 397040369 is about 734.9845703025.

The spelling of 397040369 in words is "three hundred ninety-seven million, forty thousand, three hundred sixty-nine".