398896513 has 4 divisors (see below), whose sum is σ = 399145428. Its totient is φ = 398647600.

The previous prime is 398896489. The next prime is 398896523. The reversal of 398896513 is 315698893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315698893 = 41 ⋅7699973.

It can be written as a sum of positive squares in 2 ways, for example, as 149035264 + 249861249 = 12208^2 + 15807^2 .

It is a cyclic number.

It is not a de Polignac number, because 398896513 - 2⁵ = 398896481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398896523) 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, 122038 + ... + 125263.

It is an arithmetic number, because the mean of its divisors is an integer number (99786357).

Almost surely, 2^398896513 is an apocalyptic number.

It is an amenable number.

398896513 is a deficient number, since it is larger than the sum of its proper divisors (248915).

398896513 is a wasteful number, since it uses less digits than its factorization.

398896513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248914.

The product of its digits is 1399680, while the sum is 52.

The square root of 398896513 is about 19972.3937724049. The cubic root of 398896513 is about 736.1281289069.

The spelling of 398896513 in words is "three hundred ninety-eight million, eight hundred ninety-six thousand, five hundred thirteen".