172779349 has 8 divisors (see below), whose sum is σ = 174994560. Its totient is φ = 170570400.

The previous prime is 172779323. The next prime is 172779353. The reversal of 172779349 is 943977271.

172779349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 172779349 - 2⁷ = 172779221 is a prime.

It is a super-3 number, since 3×172779349³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172779319) 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, 80014 + ... + 82144.

It is an arithmetic number, because the mean of its divisors is an integer number (21874320).

Almost surely, 2^172779349 is an apocalyptic number.

It is an amenable number.

172779349 is a deficient number, since it is larger than the sum of its proper divisors (2215211).

172779349 is an equidigital number, since it uses as much as digits as its factorization.

172779349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131.

The product of its digits is 666792, while the sum is 49.

The square root of 172779349 is about 13144.5558692563. Note that the first 3 decimals coincide. The cubic root of 172779349 is about 556.9684708507.

The spelling of 172779349 in words is "one hundred seventy-two million, seven hundred seventy-nine thousand, three hundred forty-nine".