397964269 has 4 divisors (see below), whose sum is σ = 407219296. Its totient is φ = 388709244.

The previous prime is 397964261. The next prime is 397964299. The reversal of 397964269 is 962469793.

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 397964269 - 2³ = 397964261 is a prime.

It is a super-2 number, since 2×397964269² = 316751118801408722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397964261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4627449 + ... + 4627534.

It is an arithmetic number, because the mean of its divisors is an integer number (101804824).

Almost surely, 2^397964269 is an apocalyptic number.

It is an amenable number.

397964269 is a deficient number, since it is larger than the sum of its proper divisors (9255027).

397964269 is an equidigital number, since it uses as much as digits as its factorization.

397964269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9255026.

The product of its digits is 4408992, while the sum is 55.

The square root of 397964269 is about 19949.0418065630. The cubic root of 397964269 is about 735.5542237236.

The spelling of 397964269 in words is "three hundred ninety-seven million, nine hundred sixty-four thousand, two hundred sixty-nine".