172930505 has 8 divisors (see below), whose sum is σ = 226381824. Its totient is φ = 125767600.

The previous prime is 172930487. The next prime is 172930523. The reversal of 172930505 is 505039271.

It is an interprime number because it is at equal distance from previous prime (172930487) and next prime (172930523).

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

It is a de Polignac number, because none of the positive numbers 2^k-172930505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1572041 + ... + 1572150.

It is an arithmetic number, because the mean of its divisors is an integer number (28297728).

Almost surely, 2^172930505 is an apocalyptic number.

It is an amenable number.

172930505 is a deficient number, since it is larger than the sum of its proper divisors (53451319).

172930505 is a wasteful number, since it uses less digits than its factorization.

172930505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144207.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 172930505 is about 13150.3043691011. The cubic root of 172930505 is about 557.1308447834.

Adding to 172930505 its reverse (505039271), we get a palindrome (677969776).

The spelling of 172930505 in words is "one hundred seventy-two million, nine hundred thirty thousand, five hundred five".