172967749 has 2 divisors, whose sum is σ = 172967750. Its totient is φ = 172967748.

The previous prime is 172967731. The next prime is 172967759. The reversal of 172967749 is 947769271.

172967749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137945025 + 35022724 = 11745^2 + 5918^2 .

It is a cyclic number.

It is not a de Polignac number, because 172967749 - 2²¹ = 170870597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172967696 and 172967705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172967719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86483874 + 86483875.

It is an arithmetic number, because the mean of its divisors is an integer number (86483875).

Almost surely, 2^172967749 is an apocalyptic number.

It is an amenable number.

172967749 is a deficient number, since it is larger than the sum of its proper divisors (1).

172967749 is an equidigital number, since it uses as much as digits as its factorization.

172967749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 52.

The square root of 172967749 is about 13151.7203817599. The cubic root of 172967749 is about 557.1708382898.

The spelling of 172967749 in words is "one hundred seventy-two million, nine hundred sixty-seven thousand, seven hundred forty-nine".