397749833 has 24 divisors (see below), whose sum is σ = 474911808. Its totient is φ = 330460416.

The previous prime is 397749823. The next prime is 397749839. The reversal of 397749833 is 338947793.

It is a happy number.

It is not a de Polignac number, because 397749833 - 2²⁰ = 396701257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397749839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84110 + ... + 88712.

It is an arithmetic number, because the mean of its divisors is an integer number (19787992).

Almost surely, 2^397749833 is an apocalyptic number.

It is an amenable number.

397749833 is a deficient number, since it is larger than the sum of its proper divisors (77161975).

397749833 is a wasteful number, since it uses less digits than its factorization.

397749833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4673 (or 4656 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 53.

The square root of 397749833 is about 19943.6664883867. Note that the first 3 decimals coincide. The cubic root of 397749833 is about 735.4220865309.

The spelling of 397749833 in words is "three hundred ninety-seven million, seven hundred forty-nine thousand, eight hundred thirty-three".