172269649 has 2 divisors, whose sum is σ = 172269650. Its totient is φ = 172269648.

The previous prime is 172269641. The next prime is 172269667. The reversal of 172269649 is 946962271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168169024 + 4100625 = 12968^2 + 2025^2 .

It is a cyclic number.

It is not a de Polignac number, because 172269649 - 2³ = 172269641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172269599 and 172269608.

It is not a weakly prime, because it can be changed into another prime (172269641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86134824 + 86134825.

It is an arithmetic number, because the mean of its divisors is an integer number (86134825).

Almost surely, 2^172269649 is an apocalyptic number.

It is an amenable number.

172269649 is a deficient number, since it is larger than the sum of its proper divisors (1).

172269649 is an equidigital number, since it uses as much as digits as its factorization.

172269649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 172269649 is about 13125.1532943429. The cubic root of 172269649 is about 556.4202447548.

The spelling of 172269649 in words is "one hundred seventy-two million, two hundred sixty-nine thousand, six hundred forty-nine".