400819379 has 2 divisors, whose sum is σ = 400819380. Its totient is φ = 400819378.

The previous prime is 400819361. The next prime is 400819381. The reversal of 400819379 is 973918004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400819379 - 2⁸ = 400819123 is a prime.

Together with 400819381, 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 (400819579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200409689 + 200409690.

It is an arithmetic number, because the mean of its divisors is an integer number (200409690).

Almost surely, 2^400819379 is an apocalyptic number.

400819379 is a deficient number, since it is larger than the sum of its proper divisors (1).

400819379 is an equidigital number, since it uses as much as digits as its factorization.

400819379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 400819379 is about 20020.4739953878. The cubic root of 400819379 is about 737.3090595993.

The spelling of 400819379 in words is "four hundred million, eight hundred nineteen thousand, three hundred seventy-nine".