406957823 has 2 divisors, whose sum is σ = 406957824. Its totient is φ = 406957822.

The previous prime is 406957813. The next prime is 406957853. The reversal of 406957823 is 328759604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406957823 - 2⁴ = 406957807 is a prime.

It is a super-2 number, since 2×406957823² = 331229339401798658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406957813) 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, 203478911 + 203478912.

It is an arithmetic number, because the mean of its divisors is an integer number (203478912).

Almost surely, 2^406957823 is an apocalyptic number.

406957823 is a deficient number, since it is larger than the sum of its proper divisors (1).

406957823 is an equidigital number, since it uses as much as digits as its factorization.

406957823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 406957823 is about 20173.1956566133. The cubic root of 406957823 is about 741.0539055502.

The spelling of 406957823 in words is "four hundred six million, nine hundred fifty-seven thousand, eight hundred twenty-three".