172555949 has 2 divisors, whose sum is σ = 172555950. Its totient is φ = 172555948.

The previous prime is 172555939. The next prime is 172555963. The reversal of 172555949 is 949555271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127531849 + 45024100 = 11293^2 + 6710^2 .

It is a cyclic number.

It is not a de Polignac number, because 172555949 - 2¹⁶ = 172490413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172555939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86277974 + 86277975.

It is an arithmetic number, because the mean of its divisors is an integer number (86277975).

Almost surely, 2^172555949 is an apocalyptic number.

It is an amenable number.

172555949 is a deficient number, since it is larger than the sum of its proper divisors (1).

172555949 is an equidigital number, since it uses as much as digits as its factorization.

172555949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 567000, while the sum is 47.

The square root of 172555949 is about 13136.0553059128. The cubic root of 172555949 is about 556.7283178797.

The spelling of 172555949 in words is "one hundred seventy-two million, five hundred fifty-five thousand, nine hundred forty-nine".