401993803 has 2 divisors, whose sum is σ = 401993804. Its totient is φ = 401993802.

The previous prime is 401993797. The next prime is 401993821. The reversal of 401993803 is 308399104.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401993803 is a prime.

It is not a weakly prime, because it can be changed into another prime (401993003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200996901 + 200996902.

It is an arithmetic number, because the mean of its divisors is an integer number (200996902).

Almost surely, 2^401993803 is an apocalyptic number.

401993803 is a deficient number, since it is larger than the sum of its proper divisors (1).

401993803 is an equidigital number, since it uses as much as digits as its factorization.

401993803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 401993803 is about 20049.7831160339. The cubic root of 401993803 is about 738.0284768305.

The spelling of 401993803 in words is "four hundred one million, nine hundred ninety-three thousand, eight hundred three".