400969379 has 2 divisors, whose sum is σ = 400969380. Its totient is φ = 400969378.

The previous prime is 400969357. The next prime is 400969391. The reversal of 400969379 is 973969004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400969379 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400962379) by changing a digit.

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 as a sum of consecutive naturals, namely, 200484689 + 200484690.

It is an arithmetic number, because the mean of its divisors is an integer number (200484690).

Almost surely, 2^400969379 is an apocalyptic number.

400969379 is a deficient number, since it is larger than the sum of its proper divisors (1).

400969379 is an equidigital number, since it uses as much as digits as its factorization.

400969379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 400969379 is about 20024.2198100201. The cubic root of 400969379 is about 737.4010233544.

The spelling of 400969379 in words is "four hundred million, nine hundred sixty-nine thousand, three hundred seventy-nine".