172949553 has 32 divisors (see below), whose sum is σ = 294117120. Its totient is φ = 98392320.

The previous prime is 172949549. The next prime is 172949563. The reversal of 172949553 is 355949271.

It is a happy number.

172949553 is a `hidden beast` number, since 1 + 7 + 2 + 94 + 9 + 553 = 666.

It is not a de Polignac number, because 172949553 - 2² = 172949549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172949499 and 172949508.

It is not an unprimeable number, because it can be changed into a prime (172949503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43651 + ... + 47447.

It is an arithmetic number, because the mean of its divisors is an integer number (9191160).

Almost surely, 2^172949553 is an apocalyptic number.

It is an amenable number.

172949553 is a deficient number, since it is larger than the sum of its proper divisors (121167567).

172949553 is a wasteful number, since it uses less digits than its factorization.

172949553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054 (or 4048 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 172949553 is about 13151.0285909506. The cubic root of 172949553 is about 557.1512997030.

The spelling of 172949553 in words is "one hundred seventy-two million, nine hundred forty-nine thousand, five hundred fifty-three".