172057649 has 2 divisors, whose sum is σ = 172057650. Its totient is φ = 172057648.

The previous prime is 172057643. The next prime is 172057661. The reversal of 172057649 is 946750271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129390625 + 42667024 = 11375^2 + 6532^2 .

It is a cyclic number.

It is not a de Polignac number, because 172057649 - 2¹⁶ = 171992113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172057643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86028824 + 86028825.

It is an arithmetic number, because the mean of its divisors is an integer number (86028825).

Almost surely, 2^172057649 is an apocalyptic number.

It is an amenable number.

172057649 is a deficient number, since it is larger than the sum of its proper divisors (1).

172057649 is an equidigital number, since it uses as much as digits as its factorization.

172057649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 172057649 is about 13117.0747119928. The cubic root of 172057649 is about 556.1919021256.

The spelling of 172057649 in words is "one hundred seventy-two million, fifty-seven thousand, six hundred forty-nine".