403166993 has 8 divisors (see below), whose sum is σ = 405681696. Its totient is φ = 400660000.

The previous prime is 403166989. The next prime is 403167043. The reversal of 403166993 is 399661304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 403166993 - 2² = 403166989 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 403166993.

It is not an unprimeable number, because it can be changed into a prime (403166923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129230 + ... + 132312.

It is an arithmetic number, because the mean of its divisors is an integer number (50710212).

Almost surely, 2^403166993 is an apocalyptic number.

It is an amenable number.

403166993 is a deficient number, since it is larger than the sum of its proper divisors (2514703).

403166993 is a wasteful number, since it uses less digits than its factorization.

403166993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 403166993 is about 20079.0187260234. The cubic root of 403166993 is about 738.7457405301.

The spelling of 403166993 in words is "four hundred three million, one hundred sixty-six thousand, nine hundred ninety-three".