399787403 has 8 divisors (see below), whose sum is σ = 418493088. Its totient is φ = 381192064.

The previous prime is 399787387. The next prime is 399787457. The reversal of 399787403 is 304787993.

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

It is not a de Polignac number, because 399787403 - 2⁴ = 399787387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399787463) 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, 20126 + ... + 34707.

It is an arithmetic number, because the mean of its divisors is an integer number (52311636).

Almost surely, 2^399787403 is an apocalyptic number.

399787403 is a deficient number, since it is larger than the sum of its proper divisors (18705685).

399787403 is a wasteful number, since it uses less digits than its factorization.

399787403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55173.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The square root of 399787403 is about 19994.6843686016. The cubic root of 399787403 is about 736.6757409209.

The spelling of 399787403 in words is "three hundred ninety-nine million, seven hundred eighty-seven thousand, four hundred three".