172770389 has 8 divisors (see below), whose sum is σ = 189075168. Its totient is φ = 156565360.

The previous prime is 172770331. The next prime is 172770391. The reversal of 172770389 is 983077271.

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-172770389 is a prime.

It is a super-2 number, since 2×172770389² = 59699214630422642, which contains 22 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 (172770329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21287 + ... + 28260.

It is an arithmetic number, because the mean of its divisors is an integer number (23634396).

Almost surely, 2^172770389 is an apocalyptic number.

It is an amenable number.

172770389 is a deficient number, since it is larger than the sum of its proper divisors (16304779).

172770389 is a wasteful number, since it uses less digits than its factorization.

172770389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49875.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 172770389 is about 13144.2150393243. The cubic root of 172770389 is about 556.9588429182.

The spelling of 172770389 in words is "one hundred seventy-two million, seven hundred seventy thousand, three hundred eighty-nine".