401209379 has 2 divisors, whose sum is σ = 401209380. Its totient is φ = 401209378.

The previous prime is 401209373. The next prime is 401209421. The reversal of 401209379 is 973902104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401209379 - 2¹⁶ = 401143843 is a prime.

It is not a weakly prime, because it can be changed into another prime (401209373) 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, 200604689 + 200604690.

It is an arithmetic number, because the mean of its divisors is an integer number (200604690).

Almost surely, 2^401209379 is an apocalyptic number.

401209379 is a deficient number, since it is larger than the sum of its proper divisors (1).

401209379 is an equidigital number, since it uses as much as digits as its factorization.

401209379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 401209379 is about 20030.2116563954. The cubic root of 401209379 is about 737.5481176687.

The spelling of 401209379 in words is "four hundred one million, two hundred nine thousand, three hundred seventy-nine".