403999967 has 8 divisors (see below), whose sum is σ = 476608512. Its totient is φ = 335115000.

The previous prime is 403999961. The next prime is 403999969. The reversal of 403999967 is 769999304.

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 403999967 - 2⁶ = 403999903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403999961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930659 + ... + 931092.

It is an arithmetic number, because the mean of its divisors is an integer number (59576064).

Almost surely, 2^403999967 is an apocalyptic number.

403999967 is a deficient number, since it is larger than the sum of its proper divisors (72608545).

403999967 is a wasteful number, since it uses less digits than its factorization.

403999967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861789.

The product of its (nonzero) digits is 3306744, while the sum is 56.

The square root of 403999967 is about 20099.7504213361. The cubic root of 403999967 is about 739.2541590432.

The spelling of 403999967 in words is "four hundred three million, nine hundred ninety-nine thousand, nine hundred sixty-seven".