172007811 has 12 divisors (see below), whose sum is σ = 248793792. Its totient is φ = 114515856.

The previous prime is 172007807. The next prime is 172007821. The reversal of 172007811 is 118700271.

It is not a de Polignac number, because 172007811 - 2² = 172007807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172007821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5811 + ... + 19436.

It is an arithmetic number, because the mean of its divisors is an integer number (20732816).

Almost surely, 2^172007811 is an apocalyptic number.

172007811 is a deficient number, since it is larger than the sum of its proper divisors (76785981).

172007811 is a wasteful number, since it uses less digits than its factorization.

172007811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26010 (or 26007 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 172007811 is about 13115.1748368064. The cubic root of 172007811 is about 556.1381949931.

The spelling of 172007811 in words is "one hundred seventy-two million, seven thousand, eight hundred eleven".