172263961 has 4 divisors (see below), whose sum is σ = 172595124. Its totient is φ = 171932800.

The previous prime is 172263911. The next prime is 172263967. The reversal of 172263961 is 169362271.

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

It can be written as a sum of positive squares in 2 ways, for example, as 131239936 + 41024025 = 11456^2 + 6405^2 .

It is a cyclic number.

It is not a de Polignac number, because 172263961 - 2⁹ = 172263449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172263961.

It is not an unprimeable number, because it can be changed into a prime (172263967) 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, 164800 + ... + 165841.

It is an arithmetic number, because the mean of its divisors is an integer number (43148781).

Almost surely, 2^172263961 is an apocalyptic number.

It is an amenable number.

172263961 is a deficient number, since it is larger than the sum of its proper divisors (331163).

172263961 is an equidigital number, since it uses as much as digits as its factorization.

172263961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331162.

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

The square root of 172263961 is about 13124.9366093707. The cubic root of 172263961 is about 556.4141207254.

The spelling of 172263961 in words is "one hundred seventy-two million, two hundred sixty-three thousand, nine hundred sixty-one".