172969613 has 4 divisors (see below), whose sum is σ = 173024640. Its totient is φ = 172914588.

The previous prime is 172969609. The next prime is 172969681. The reversal of 172969613 is 316969271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 316969271 = 15569 ⋅20359.

It is a cyclic number.

It is not a de Polignac number, because 172969613 - 2² = 172969609 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 (172969513) 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, 22493 + ... + 29186.

It is an arithmetic number, because the mean of its divisors is an integer number (43256160).

Almost surely, 2^172969613 is an apocalyptic number.

It is an amenable number.

172969613 is a deficient number, since it is larger than the sum of its proper divisors (55027).

172969613 is an equidigital number, since it uses as much as digits as its factorization.

172969613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55026.

The product of its digits is 122472, while the sum is 44.

The square root of 172969613 is about 13151.7912468226. The cubic root of 172969613 is about 557.1728397471.

The spelling of 172969613 in words is "one hundred seventy-two million, nine hundred sixty-nine thousand, six hundred thirteen".