403661163 has 4 divisors (see below), whose sum is σ = 538214888. Its totient is φ = 269107440.

The previous prime is 403661147. The next prime is 403661177. The reversal of 403661163 is 361166304.

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

It is not a de Polignac number, because 403661163 - 2⁴ = 403661147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 403661163.

It is not an unprimeable number, because it can be changed into a prime (403661123) 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, 67276858 + ... + 67276863.

It is an arithmetic number, because the mean of its divisors is an integer number (134553722).

Almost surely, 2^403661163 is an apocalyptic number.

403661163 is a deficient number, since it is larger than the sum of its proper divisors (134553725).

403661163 is a wasteful number, since it uses less digits than its factorization.

403661163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134553724.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 403661163 is about 20091.3205887518. The cubic root of 403661163 is about 739.0474491968.

The spelling of 403661163 in words is "four hundred three million, six hundred sixty-one thousand, one hundred sixty-three".