401304623 has 2 divisors, whose sum is σ = 401304624. Its totient is φ = 401304622.

The previous prime is 401304619. The next prime is 401304637. The reversal of 401304623 is 326403104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401304623 - 2² = 401304619 is a prime.

It is a super-2 number, since 2×401304623² = 322090800882344258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400304623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200652311 + 200652312.

It is an arithmetic number, because the mean of its divisors is an integer number (200652312).

Almost surely, 2^401304623 is an apocalyptic number.

401304623 is a deficient number, since it is larger than the sum of its proper divisors (1).

401304623 is an equidigital number, since it uses as much as digits as its factorization.

401304623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 401304623 is about 20032.5890238881. The cubic root of 401304623 is about 737.6064757885.

Adding to 401304623 its reverse (326403104), we get a palindrome (727707727).

The spelling of 401304623 in words is "four hundred one million, three hundred four thousand, six hundred twenty-three".