172869601 has 2 divisors, whose sum is σ = 172869602. Its totient is φ = 172869600.

The previous prime is 172869577. The next prime is 172869611. The reversal of 172869601 is 106968271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109746576 + 63123025 = 10476^2 + 7945^2 .

It is a cyclic number.

It is not a de Polignac number, because 172869601 - 2²¹ = 170772449 is a prime.

It is not a weakly prime, because it can be changed into another prime (172869611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86434800 + 86434801.

It is an arithmetic number, because the mean of its divisors is an integer number (86434801).

Almost surely, 2^172869601 is an apocalyptic number.

It is an amenable number.

172869601 is a deficient number, since it is larger than the sum of its proper divisors (1).

172869601 is an equidigital number, since it uses as much as digits as its factorization.

172869601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 172869601 is about 13147.9884773299. The cubic root of 172869601 is about 557.0654322233.

The spelling of 172869601 in words is "one hundred seventy-two million, eight hundred sixty-nine thousand, six hundred one".