400953983 has 2 divisors, whose sum is σ = 400953984. Its totient is φ = 400953982.

The previous prime is 400953967. The next prime is 400953997. The reversal of 400953983 is 389359004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400953983 - 2⁴ = 400953967 is a prime.

It is a super-3 number, since 3×400953983³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400953983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400953923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200476991 + 200476992.

It is an arithmetic number, because the mean of its divisors is an integer number (200476992).

Almost surely, 2^400953983 is an apocalyptic number.

400953983 is a deficient number, since it is larger than the sum of its proper divisors (1).

400953983 is an equidigital number, since it uses as much as digits as its factorization.

400953983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 400953983 is about 20023.8353718762. The cubic root of 400953983 is about 737.3915852509.

The spelling of 400953983 in words is "four hundred million, nine hundred fifty-three thousand, nine hundred eighty-three".