172874729 has 8 divisors (see below), whose sum is σ = 174650112. Its totient is φ = 171108720.

The previous prime is 172874687. The next prime is 172874743. The reversal of 172874729 is 927478271.

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 172874729 - 2⁸ = 172874473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172874759) 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, 38222 + ... + 42504.

It is an arithmetic number, because the mean of its divisors is an integer number (21831264).

Almost surely, 2^172874729 is an apocalyptic number.

It is an amenable number.

172874729 is a deficient number, since it is larger than the sum of its proper divisors (1775383).

172874729 is a wasteful number, since it uses less digits than its factorization.

172874729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4687.

The product of its digits is 395136, while the sum is 47.

The square root of 172874729 is about 13148.1834867026. The cubic root of 172874729 is about 557.0709404277.

The spelling of 172874729 in words is "one hundred seventy-two million, eight hundred seventy-four thousand, seven hundred twenty-nine".