397942445 has 8 divisors (see below), whose sum is σ = 477645336. Its totient is φ = 318277696.

The previous prime is 397942439. The next prime is 397942453. The reversal of 397942445 is 544249793.

397942445 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 259081 + 397683364 = 509^2 + 19942^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 397942445 - 2¹⁰ = 397941421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397942445.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24419 + ... + 37311.

It is an arithmetic number, because the mean of its divisors is an integer number (59705667).

Almost surely, 2^397942445 is an apocalyptic number.

It is an amenable number.

397942445 is a deficient number, since it is larger than the sum of its proper divisors (79702891).

397942445 is a wasteful number, since it uses less digits than its factorization.

397942445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19071.

The product of its digits is 1088640, while the sum is 47.

The square root of 397942445 is about 19948.4948053732. The cubic root of 397942445 is about 735.5407777687.

The spelling of 397942445 in words is "three hundred ninety-seven million, nine hundred forty-two thousand, four hundred forty-five".