172434553 has 8 divisors (see below), whose sum is σ = 182925000. Its totient is φ = 161982720.

The previous prime is 172434547. The next prime is 172434569. The reversal of 172434553 is 355434271.

It can be written as a sum of positive squares in 4 ways, for example, as 48958009 + 123476544 = 6997^2 + 11112^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172434553 - 2²⁵ = 138880121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172434523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178 + ... + 18571.

It is an arithmetic number, because the mean of its divisors is an integer number (22865625).

Almost surely, 2^172434553 is an apocalyptic number.

It is an amenable number.

172434553 is a deficient number, since it is larger than the sum of its proper divisors (10490447).

172434553 is a wasteful number, since it uses less digits than its factorization.

172434553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19307.

The product of its digits is 50400, while the sum is 34.

The square root of 172434553 is about 13131.4337754870. The cubic root of 172434553 is about 556.5977313532.

The spelling of 172434553 in words is "one hundred seventy-two million, four hundred thirty-four thousand, five hundred fifty-three".