172671949 has 2 divisors, whose sum is σ = 172671950. Its totient is φ = 172671948.

The previous prime is 172671913. The next prime is 172671977. The reversal of 172671949 is 949176271.

172671949 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., 169130025 + 3541924 = 13005^2 + 1882^2 .

It is a cyclic number.

It is not a de Polignac number, because 172671949 - 2¹⁷ = 172540877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172671899 and 172671908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172671979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86335974 + 86335975.

It is an arithmetic number, because the mean of its divisors is an integer number (86335975).

Almost surely, 2^172671949 is an apocalyptic number.

It is an amenable number.

172671949 is a deficient number, since it is larger than the sum of its proper divisors (1).

172671949 is an equidigital number, since it uses as much as digits as its factorization.

172671949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 172671949 is about 13140.4698926637. The cubic root of 172671949 is about 556.8530426802.

The spelling of 172671949 in words is "one hundred seventy-two million, six hundred seventy-one thousand, nine hundred forty-nine".