172616243 has 4 divisors (see below), whose sum is σ = 172932360. Its totient is φ = 172300128.

The previous prime is 172616237. The next prime is 172616251. The reversal of 172616243 is 342616271.

172616243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342616271 = 7127 ⋅48073.

It is a cyclic number.

It is not a de Polignac number, because 172616243 - 2¹⁴ = 172599859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172616443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157238 + ... + 158331.

It is an arithmetic number, because the mean of its divisors is an integer number (43233090).

Almost surely, 2^172616243 is an apocalyptic number.

172616243 is a deficient number, since it is larger than the sum of its proper divisors (316117).

172616243 is an equidigital number, since it uses as much as digits as its factorization.

172616243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316116.

The product of its digits is 12096, while the sum is 32.

The square root of 172616243 is about 13138.3500866737. The cubic root of 172616243 is about 556.7931537942.

The spelling of 172616243 in words is "one hundred seventy-two million, six hundred sixteen thousand, two hundred forty-three".