172751849 has 2 divisors, whose sum is σ = 172751850. Its totient is φ = 172751848.

The previous prime is 172751833. The next prime is 172751851. The reversal of 172751849 is 948157271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133564249 + 39187600 = 11557^2 + 6260^2 .

It is a cyclic number.

It is not a de Polignac number, because 172751849 - 2⁴ = 172751833 is a prime.

Together with 172751851, 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 (172751549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86375924 + 86375925.

It is an arithmetic number, because the mean of its divisors is an integer number (86375925).

Almost surely, 2^172751849 is an apocalyptic number.

It is an amenable number.

172751849 is a deficient number, since it is larger than the sum of its proper divisors (1).

172751849 is an equidigital number, since it uses as much as digits as its factorization.

172751849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 44.

The square root of 172751849 is about 13143.5097671817. The cubic root of 172751849 is about 556.9389197774.

The spelling of 172751849 in words is "one hundred seventy-two million, seven hundred fifty-one thousand, eight hundred forty-nine".