398699479 has 4 divisors (see below), whose sum is σ = 399091000. Its totient is φ = 398307960.

The previous prime is 398699423. The next prime is 398699489. The reversal of 398699479 is 974996893.

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 398699479 - 2²⁷ = 264481751 is a prime.

It is a super-3 number, since 3×398699479³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398699479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398699489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194229 + ... + 196270.

It is an arithmetic number, because the mean of its divisors is an integer number (99772750).

Almost surely, 2^398699479 is an apocalyptic number.

398699479 is a deficient number, since it is larger than the sum of its proper divisors (391521).

398699479 is a wasteful number, since it uses less digits than its factorization.

398699479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391520.

The product of its digits is 26453952, while the sum is 64.

The square root of 398699479 is about 19967.4605045309. The cubic root of 398699479 is about 736.0069060227.

The spelling of 398699479 in words is "three hundred ninety-eight million, six hundred ninety-nine thousand, four hundred seventy-nine".