172444769 has 6 divisors (see below), whose sum is σ = 200599074. Its totient is φ = 147809760.

The previous prime is 172444733. The next prime is 172444771. The reversal of 172444769 is 967444271.

It can be written as a sum of positive squares in only one way, i.e., 112614544 + 59830225 = 10612^2 + 7735^2 .

It is a de Polignac number, because none of the positive numbers 2^k-172444769 is a prime.

It is a super-2 number, since 2×172444769² = 59474396710926722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172444799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1759592 + ... + 1759689.

It is an arithmetic number, because the mean of its divisors is an integer number (33433179).

Almost surely, 2^172444769 is an apocalyptic number.

It is an amenable number.

172444769 is a deficient number, since it is larger than the sum of its proper divisors (28154305).

172444769 is an equidigital number, since it uses as much as digits as its factorization.

172444769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519295 (or 3519288 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 172444769 is about 13131.8227599979. The cubic root of 172444769 is about 556.6087231373.

The spelling of 172444769 in words is "one hundred seventy-two million, four hundred forty-four thousand, seven hundred sixty-nine".