404361851 has 2 divisors, whose sum is σ = 404361852. Its totient is φ = 404361850.

The previous prime is 404361823. The next prime is 404361871. The reversal of 404361851 is 158163404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404361851 is a prime.

It is not a weakly prime, because it can be changed into another prime (404361871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202180925 + 202180926.

It is an arithmetic number, because the mean of its divisors is an integer number (202180926).

Almost surely, 2^404361851 is an apocalyptic number.

404361851 is a deficient number, since it is larger than the sum of its proper divisors (1).

404361851 is an equidigital number, since it uses as much as digits as its factorization.

404361851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 404361851 is about 20108.7506076335. The cubic root of 404361851 is about 739.4748227685.

The spelling of 404361851 in words is "four hundred four million, three hundred sixty-one thousand, eight hundred fifty-one".