165698013 has 8 divisors (see below), whose sum is σ = 237925408. Its totient is φ = 101967984.

The previous prime is 165698011. The next prime is 165698017. The reversal of 165698013 is 310896561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165698013 - 2¹ = 165698011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 4248667 = 165698013 / (1 + 6 + 5 + 6 + 9 + 8 + 0 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165698011) 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, 2124295 + ... + 2124372.

It is an arithmetic number, because the mean of its divisors is an integer number (29740676).

Almost surely, 2^165698013 is an apocalyptic number.

165698013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

165698013 is a deficient number, since it is larger than the sum of its proper divisors (72227395).

165698013 is a wasteful number, since it uses less digits than its factorization.

165698013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248683.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 165698013 is about 12872.3740234659. The cubic root of 165698013 is about 549.2529946985.

The spelling of 165698013 in words is "one hundred sixty-five million, six hundred ninety-eight thousand, thirteen".