172872735 has 48 divisors (see below), whose sum is σ = 338716800. Its totient is φ = 74862144.

The previous prime is 172872727. The next prime is 172872737. The reversal of 172872735 is 537278271.

It is not a de Polignac number, because 172872735 - 2³ = 172872727 is a prime.

It is a super-3 number, since 3×172872735³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172872737) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7776 + ... + 20154.

It is an arithmetic number, because the mean of its divisors is an integer number (7056600).

Almost surely, 2^172872735 is an apocalyptic number.

172872735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172872735 is a deficient number, since it is larger than the sum of its proper divisors (165844065).

172872735 is a wasteful number, since it uses less digits than its factorization.

172872735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12420 (or 12413 counting only the distinct ones).

The product of its digits is 164640, while the sum is 42.

The square root of 172872735 is about 13148.1076585188. The cubic root of 172872735 is about 557.0687985999.

The spelling of 172872735 in words is "one hundred seventy-two million, eight hundred seventy-two thousand, seven hundred thirty-five".