172677949 has 2 divisors, whose sum is σ = 172677950. Its totient is φ = 172677948.

The previous prime is 172677917. The next prime is 172677971. The reversal of 172677949 is 949776271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109872324 + 62805625 = 10482^2 + 7925^2 .

It is a cyclic number.

It is not a de Polignac number, because 172677949 - 2⁵ = 172677917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172677896 and 172677905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172677979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86338974 + 86338975.

It is an arithmetic number, because the mean of its divisors is an integer number (86338975).

Almost surely, 2^172677949 is an apocalyptic number.

It is an amenable number.

172677949 is a deficient number, since it is larger than the sum of its proper divisors (1).

172677949 is an equidigital number, since it uses as much as digits as its factorization.

172677949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 52.

The square root of 172677949 is about 13140.6981930185. The cubic root of 172677949 is about 556.8594924435.

The spelling of 172677949 in words is "one hundred seventy-two million, six hundred seventy-seven thousand, nine hundred forty-nine".