403944997 has 8 divisors (see below), whose sum is σ = 435576960. Its totient is φ = 373350240.

The previous prime is 403944979. The next prime is 403945001. The reversal of 403944997 is 799449304.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403944997 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 403944997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403944907) 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, 258493 + ... + 260050.

It is an arithmetic number, because the mean of its divisors is an integer number (54447120).

Almost surely, 2^403944997 is an apocalyptic number.

It is an amenable number.

403944997 is a deficient number, since it is larger than the sum of its proper divisors (31631963).

403944997 is a wasteful number, since it uses less digits than its factorization.

403944997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518603.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 403944997 is about 20098.3829449038. The cubic root of 403944997 is about 739.2206288058.

The spelling of 403944997 in words is "four hundred three million, nine hundred forty-four thousand, nine hundred ninety-seven".