172740613 has 4 divisors (see below), whose sum is σ = 175668480. Its totient is φ = 169812748.

The previous prime is 172740583. The next prime is 172740629. The reversal of 172740613 is 316047271.

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.

It is a cyclic number.

It is not a de Polignac number, because 172740613 - 2²¹ = 170643461 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 (172740683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1463845 + ... + 1463962.

It is an arithmetic number, because the mean of its divisors is an integer number (43917120).

Almost surely, 2^172740613 is an apocalyptic number.

It is an amenable number.

172740613 is a deficient number, since it is larger than the sum of its proper divisors (2927867).

172740613 is an equidigital number, since it uses as much as digits as its factorization.

172740613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2927866.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 172740613 is about 13143.0823249343. The cubic root of 172740613 is about 556.9268448437.

Adding to 172740613 its reverse (316047271), we get a palindrome (488787884).

The spelling of 172740613 in words is "one hundred seventy-two million, seven hundred forty thousand, six hundred thirteen".