401603947 has 4 divisors (see below), whose sum is σ = 402266176. Its totient is φ = 400941720.

The previous prime is 401603929. The next prime is 401603999. The reversal of 401603947 is 749306104.

It is a happy number.

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-401603947 is a prime.

It is a super-2 number, since 2×401603947² = 322571460491957618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401603927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330204 + ... + 331417.

It is an arithmetic number, because the mean of its divisors is an integer number (100566544).

Almost surely, 2^401603947 is an apocalyptic number.

401603947 is a deficient number, since it is larger than the sum of its proper divisors (662229).

401603947 is an equidigital number, since it uses as much as digits as its factorization.

401603947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662228.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 401603947 is about 20040.0585577987. The cubic root of 401603947 is about 737.7898181826.

The spelling of 401603947 in words is "four hundred one million, six hundred three thousand, nine hundred forty-seven".