172261963 has 4 divisors (see below), whose sum is σ = 172897888. Its totient is φ = 171626040.

The previous prime is 172261939. The next prime is 172261997. The reversal of 172261963 is 369162271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172261963 - 2¹³ = 172253771 is a prime.

It is a super-2 number, since 2×172261963² = 59348367793226738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172265963) 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, 317556 + ... + 318097.

It is an arithmetic number, because the mean of its divisors is an integer number (43224472).

Almost surely, 2^172261963 is an apocalyptic number.

172261963 is a deficient number, since it is larger than the sum of its proper divisors (635925).

172261963 is an equidigital number, since it uses as much as digits as its factorization.

172261963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635924.

The product of its digits is 27216, while the sum is 37.

The square root of 172261963 is about 13124.8604944967. The cubic root of 172261963 is about 556.4119695312.

The spelling of 172261963 in words is "one hundred seventy-two million, two hundred sixty-one thousand, nine hundred sixty-three".