397549379 has 2 divisors, whose sum is σ = 397549380. Its totient is φ = 397549378.

The previous prime is 397549351. The next prime is 397549381. The reversal of 397549379 is 973945793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397549379 - 2¹² = 397545283 is a prime.

Together with 397549381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (397549309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198774689 + 198774690.

It is an arithmetic number, because the mean of its divisors is an integer number (198774690).

Almost surely, 2^397549379 is an apocalyptic number.

397549379 is a deficient number, since it is larger than the sum of its proper divisors (1).

397549379 is an equidigital number, since it uses as much as digits as its factorization.

397549379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6429780, while the sum is 56.

The square root of 397549379 is about 19938.6403498333. The cubic root of 397549379 is about 735.2985222045.

The spelling of 397549379 in words is "three hundred ninety-seven million, five hundred forty-nine thousand, three hundred seventy-nine".