172681733 has 12 divisors (see below), whose sum is σ = 212691852. Its totient is φ = 139305600.

The previous prime is 172681703. The next prime is 172681739. The reversal of 172681733 is 337186271.

It can be written as a sum of positive squares in 2 ways, for example, as 60808804 + 111872929 = 7798^2 + 10577^2 .

It is not a de Polignac number, because 172681733 - 2⁸ = 172681477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172681739) 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, 102818 + ... + 104483.

It is an arithmetic number, because the mean of its divisors is an integer number (17724321).

Almost surely, 2^172681733 is an apocalyptic number.

It is an amenable number.

172681733 is a deficient number, since it is larger than the sum of its proper divisors (40010119).

172681733 is a wasteful number, since it uses less digits than its factorization.

172681733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207332 (or 207325 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The square root of 172681733 is about 13140.8421724028. The cubic root of 172681733 is about 556.8635600173.

The spelling of 172681733 in words is "one hundred seventy-two million, six hundred eighty-one thousand, seven hundred thirty-three".