401249663 has 2 divisors, whose sum is σ = 401249664. Its totient is φ = 401249662.

The previous prime is 401249621. The next prime is 401249677. The reversal of 401249663 is 366942104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401249663 - 2¹⁸ = 400987519 is a prime.

It is a super-2 number, since 2×401249663² = 322002584115227138, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401249603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200624831 + 200624832.

It is an arithmetic number, because the mean of its divisors is an integer number (200624832).

Almost surely, 2^401249663 is an apocalyptic number.

401249663 is a deficient number, since it is larger than the sum of its proper divisors (1).

401249663 is an equidigital number, since it uses as much as digits as its factorization.

401249663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 401249663 is about 20031.2172121417. The cubic root of 401249663 is about 737.5728016995.

The spelling of 401249663 in words is "four hundred one million, two hundred forty-nine thousand, six hundred sixty-three".