397120949 has 4 divisors (see below), whose sum is σ = 402561036. Its totient is φ = 391680864.

The previous prime is 397120931. The next prime is 397120951. The reversal of 397120949 is 949021793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 256224049 + 140896900 = 16007^2 + 11870^2 .

It is a cyclic number.

It is not a de Polignac number, because 397120949 - 2¹⁶ = 397055413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397120049) 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, 2719934 + ... + 2720079.

It is an arithmetic number, because the mean of its divisors is an integer number (100640259).

Almost surely, 2^397120949 is an apocalyptic number.

It is an amenable number.

397120949 is a deficient number, since it is larger than the sum of its proper divisors (5440087).

397120949 is an equidigital number, since it uses as much as digits as its factorization.

397120949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440086.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 397120949 is about 19927.8937421896. The cubic root of 397120949 is about 735.0342890508.

The spelling of 397120949 in words is "three hundred ninety-seven million, one hundred twenty thousand, nine hundred forty-nine".