172645049 has 2 divisors, whose sum is σ = 172645050. Its totient is φ = 172645048.

The previous prime is 172645027. The next prime is 172645051. The reversal of 172645049 is 940546271.

172645049 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., 126405049 + 46240000 = 11243^2 + 6800^2 .

It is a cyclic number.

It is not a de Polignac number, because 172645049 - 2¹⁶ = 172579513 is a prime.

Together with 172645051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172645069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86322524 + 86322525.

It is an arithmetic number, because the mean of its divisors is an integer number (86322525).

Almost surely, 2^172645049 is an apocalyptic number.

It is an amenable number.

172645049 is a deficient number, since it is larger than the sum of its proper divisors (1).

172645049 is an equidigital number, since it uses as much as digits as its factorization.

172645049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 172645049 is about 13139.4462973141. The cubic root of 172645049 is about 556.8241244051.

The spelling of 172645049 in words is "one hundred seventy-two million, six hundred forty-five thousand, forty-nine".