165376613 has 4 divisors (see below), whose sum is σ = 165420588. Its totient is φ = 165332640.

The previous prime is 165376583. The next prime is 165376639. The reversal of 165376613 is 316673561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 316673561 = 71 ⋅4460191.

It can be written as a sum of positive squares in 2 ways, for example, as 42211009 + 123165604 = 6497^2 + 11098^2 .

It is a cyclic number.

It is not a de Polignac number, because 165376613 - 2²⁶ = 98267749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165376213) 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, 15758 + ... + 24063.

It is an arithmetic number, because the mean of its divisors is an integer number (41355147).

Almost surely, 2^165376613 is an apocalyptic number.

It is an amenable number.

165376613 is a deficient number, since it is larger than the sum of its proper divisors (43975).

165376613 is an equidigital number, since it uses as much as digits as its factorization.

165376613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43974.

The product of its digits is 68040, while the sum is 38.

The square root of 165376613 is about 12859.8838641723. The cubic root of 165376613 is about 548.8976410661.

The spelling of 165376613 in words is "one hundred sixty-five million, three hundred seventy-six thousand, six hundred thirteen".