172893109047 has 16 divisors (see below), whose sum is σ = 236787937152. Its totient is φ = 112131056160.

The previous prime is 172893109013. The next prime is 172893109069. The reversal of 172893109047 is 740901398271.

It is not a de Polignac number, because 172893109047 - 2¹¹ = 172893106999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172893109847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 707508 + ... + 919974.

It is an arithmetic number, because the mean of its divisors is an integer number (14799246072).

Almost surely, 2^172893109047 is an apocalyptic number.

172893109047 is a deficient number, since it is larger than the sum of its proper divisors (63894828105).

172893109047 is a wasteful number, since it uses less digits than its factorization.

172893109047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219838.

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 172893109047 in words is "one hundred seventy-two billion, eight hundred ninety-three million, one hundred nine thousand, forty-seven".