399284997 has 8 divisors (see below), whose sum is σ = 532525344. Its totient is φ = 266117328.

The previous prime is 399284989. The next prime is 399284999. The reversal of 399284997 is 799482993.

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

It is not a de Polignac number, because 399284997 - 2³ = 399284989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399284997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399284999) 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, 3703 + ... + 28500.

It is an arithmetic number, because the mean of its divisors is an integer number (66565668).

Almost surely, 2^399284997 is an apocalyptic number.

It is an amenable number.

399284997 is a deficient number, since it is larger than the sum of its proper divisors (133240347).

399284997 is a wasteful number, since it uses less digits than its factorization.

399284997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36339.

The product of its digits is 8817984, while the sum is 60.

The square root of 399284997 is about 19982.1169298951. The cubic root of 399284997 is about 736.3670222912.

The spelling of 399284997 in words is "three hundred ninety-nine million, two hundred eighty-four thousand, nine hundred ninety-seven".