398699533 has 4 divisors (see below), whose sum is σ = 398863228. Its totient is φ = 398535840.

The previous prime is 398699527. The next prime is 398699537. The reversal of 398699533 is 335996893.

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

It can be written as a sum of positive squares in 2 ways, for example, as 288932004 + 109767529 = 16998^2 + 10477^2 .

It is a cyclic number.

It is not a de Polignac number, because 398699533 - 2²⁵ = 365145101 is a prime.

It is a super-2 number, since 2×398699533² = 317922635228836178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398699537) 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, 78138 + ... + 83083.

It is an arithmetic number, because the mean of its divisors is an integer number (99715807).

Almost surely, 2^398699533 is an apocalyptic number.

It is an amenable number.

398699533 is a deficient number, since it is larger than the sum of its proper divisors (163695).

398699533 is a wasteful number, since it uses less digits than its factorization.

398699533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163694.

The product of its digits is 4723920, while the sum is 55.

The square root of 398699533 is about 19967.4618567308. The cubic root of 398699533 is about 736.0069392511.

The spelling of 398699533 in words is "three hundred ninety-eight million, six hundred ninety-nine thousand, five hundred thirty-three".