401798783 has 4 divisors (see below), whose sum is σ = 402303720. Its totient is φ = 401293848.

The previous prime is 401798773. The next prime is 401798807. The reversal of 401798783 is 387897104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401798783 is a prime.

It is a super-2 number, since 2×401798783² = 322884524040562178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401798773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251273 + ... + 252866.

It is an arithmetic number, because the mean of its divisors is an integer number (100575930).

Almost surely, 2^401798783 is an apocalyptic number.

401798783 is a deficient number, since it is larger than the sum of its proper divisors (504937).

401798783 is an equidigital number, since it uses as much as digits as its factorization.

401798783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504936.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 401798783 is about 20044.9191317900. The cubic root of 401798783 is about 737.9091104839.

The spelling of 401798783 in words is "four hundred one million, seven hundred ninety-eight thousand, seven hundred eighty-three".