400970663 has 2 divisors, whose sum is σ = 400970664. Its totient is φ = 400970662.

The previous prime is 400970651. The next prime is 400970671. The reversal of 400970663 is 366079004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400970663 - 2¹⁸ = 400708519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400970683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200485331 + 200485332.

It is an arithmetic number, because the mean of its divisors is an integer number (200485332).

Almost surely, 2^400970663 is an apocalyptic number.

400970663 is a deficient number, since it is larger than the sum of its proper divisors (1).

400970663 is an equidigital number, since it uses as much as digits as its factorization.

400970663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 400970663 is about 20024.2518711686. The cubic root of 400970663 is about 737.4018104651.

The spelling of 400970663 in words is "four hundred million, nine hundred seventy thousand, six hundred sixty-three".