400983523 has 2 divisors, whose sum is σ = 400983524. Its totient is φ = 400983522.

The previous prime is 400983509. The next prime is 400983563. The reversal of 400983523 is 325389004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400983523 - 2²⁵ = 367429091 is a prime.

It is not a weakly prime, because it can be changed into another prime (400983503) 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, 200491761 + 200491762.

It is an arithmetic number, because the mean of its divisors is an integer number (200491762).

Almost surely, 2^400983523 is an apocalyptic number.

400983523 is a deficient number, since it is larger than the sum of its proper divisors (1).

400983523 is an equidigital number, since it uses as much as digits as its factorization.

400983523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 400983523 is about 20024.5729792173. The cubic root of 400983523 is about 737.4096937400.

The spelling of 400983523 in words is "four hundred million, nine hundred eighty-three thousand, five hundred twenty-three".