172706434 has 16 divisors (see below), whose sum is σ = 275130648. Its totient is φ = 81027072.

The previous prime is 172706431. The next prime is 172706459. The reversal of 172706434 is 434607271.

It can be written as a sum of positive squares in 4 ways, for example, as 149695225 + 23011209 = 12235^2 + 4797^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 172706434.

It is not an unprimeable number, because it can be changed into a prime (172706431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3922 + ... + 18994.

Almost surely, 2^172706434 is an apocalyptic number.

172706434 is a deficient number, since it is larger than the sum of its proper divisors (102424214).

172706434 is a wasteful number, since it uses less digits than its factorization.

172706434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15429.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 172706434 is about 13141.7819948438. The cubic root of 172706434 is about 556.8901106562.

The spelling of 172706434 in words is "one hundred seventy-two million, seven hundred six thousand, four hundred thirty-four".