399098699 has 4 divisors (see below), whose sum is σ = 405055464. Its totient is φ = 393141936.

The previous prime is 399098683. The next prime is 399098723. The reversal of 399098699 is 996890993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 399098699 - 2⁴ = 399098683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399098659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2978282 + ... + 2978415.

It is an arithmetic number, because the mean of its divisors is an integer number (101263866).

Almost surely, 2^399098699 is an apocalyptic number.

399098699 is a deficient number, since it is larger than the sum of its proper divisors (5956765).

399098699 is an equidigital number, since it uses as much as digits as its factorization.

399098699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5956764.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The square root of 399098699 is about 19977.4547678126. The cubic root of 399098699 is about 736.2524800087.

The spelling of 399098699 in words is "three hundred ninety-nine million, ninety-eight thousand, six hundred ninety-nine".