172940761 has 8 divisors (see below), whose sum is σ = 197817984. Its totient is φ = 148106400.

The previous prime is 172940731. The next prime is 172940773. The reversal of 172940761 is 167049271.

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

It is a cyclic number.

It is not a de Polignac number, because 172940761 - 2¹¹ = 172938713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172940761.

It is not an unprimeable number, because it can be changed into a prime (172940731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1540 + ... + 18661.

It is an arithmetic number, because the mean of its divisors is an integer number (24727248).

Almost surely, 2^172940761 is an apocalyptic number.

It is an amenable number.

172940761 is a deficient number, since it is larger than the sum of its proper divisors (24877223).

172940761 is a wasteful number, since it uses less digits than its factorization.

172940761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21431.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 172940761 is about 13150.6943162709. The cubic root of 172940761 is about 557.1418584967.

The spelling of 172940761 in words is "one hundred seventy-two million, nine hundred forty thousand, seven hundred sixty-one".