400417379 has 2 divisors, whose sum is σ = 400417380. Its totient is φ = 400417378.

The previous prime is 400417321. The next prime is 400417399. The reversal of 400417379 is 973714004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400417379 - 2¹² = 400413283 is a prime.

It is not a weakly prime, because it can be changed into another prime (400417309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200208689 + 200208690.

It is an arithmetic number, because the mean of its divisors is an integer number (200208690).

Almost surely, 2^400417379 is an apocalyptic number.

400417379 is a deficient number, since it is larger than the sum of its proper divisors (1).

400417379 is an equidigital number, since it uses as much as digits as its factorization.

400417379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 400417379 is about 20010.4317544625. The cubic root of 400417379 is about 737.0624835411.

The spelling of 400417379 in words is "four hundred million, four hundred seventeen thousand, three hundred seventy-nine".