400251023 has 2 divisors, whose sum is σ = 400251024. Its totient is φ = 400251022.

The previous prime is 400251001. The next prime is 400251031. The reversal of 400251023 is 320152004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400251023 - 2⁶ = 400250959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400250992 and 400251010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400253023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200125511 + 200125512.

It is an arithmetic number, because the mean of its divisors is an integer number (200125512).

Almost surely, 2^400251023 is an apocalyptic number.

400251023 is a deficient number, since it is larger than the sum of its proper divisors (1).

400251023 is an equidigital number, since it uses as much as digits as its factorization.

400251023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 400251023 is about 20006.2745907378. The cubic root of 400251023 is about 736.9603969374.

The spelling of 400251023 in words is "four hundred million, two hundred fifty-one thousand, twenty-three".