399825799 has 8 divisors (see below), whose sum is σ = 409311792. Its totient is φ = 390411840.

The previous prime is 399825793. The next prime is 399825827. The reversal of 399825799 is 997528993.

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-399825799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399825793) 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, 6694 + ... + 29059.

It is an arithmetic number, because the mean of its divisors is an integer number (51163974).

Almost surely, 2^399825799 is an apocalyptic number.

399825799 is a deficient number, since it is larger than the sum of its proper divisors (9485993).

399825799 is a wasteful number, since it uses less digits than its factorization.

399825799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36017.

The product of its digits is 11022480, while the sum is 61.

The square root of 399825799 is about 19995.6445007407. The cubic root of 399825799 is about 736.6993238686.

The spelling of 399825799 in words is "three hundred ninety-nine million, eight hundred twenty-five thousand, seven hundred ninety-nine".