172849739 has 8 divisors (see below), whose sum is σ = 174278160. Its totient is φ = 171426816.

The previous prime is 172849717. The next prime is 172849771. The reversal of 172849739 is 937948271.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172849739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172849799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80747 + ... + 82859.

It is an arithmetic number, because the mean of its divisors is an integer number (21784770).

Almost surely, 2^172849739 is an apocalyptic number.

172849739 is a deficient number, since it is larger than the sum of its proper divisors (1428421).

172849739 is a wasteful number, since it uses less digits than its factorization.

172849739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749.

The product of its digits is 762048, while the sum is 50.

The square root of 172849739 is about 13147.2331309671. The cubic root of 172849739 is about 557.0440965704.

The spelling of 172849739 in words is "one hundred seventy-two million, eight hundred forty-nine thousand, seven hundred thirty-nine".