397042049 has 4 divisors (see below), whose sum is σ = 401135364. Its totient is φ = 392948736.

The previous prime is 397042039. The next prime is 397042097. The reversal of 397042049 is 940240793.

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 131515024 + 265527025 = 11468^2 + 16295^2 .

It is a cyclic number.

It is not a de Polignac number, because 397042049 - 2¹⁶ = 396976513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397042039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2046512 + ... + 2046705.

It is an arithmetic number, because the mean of its divisors is an integer number (100283841).

Almost surely, 2^397042049 is an apocalyptic number.

It is an amenable number.

397042049 is a deficient number, since it is larger than the sum of its proper divisors (4093315).

397042049 is an equidigital number, since it uses as much as digits as its factorization.

397042049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4093314.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 397042049 is about 19925.9140066397. The cubic root of 397042049 is about 734.9856069497.

The spelling of 397042049 in words is "three hundred ninety-seven million, forty-two thousand, forty-nine".