172764485 has 4 divisors (see below), whose sum is σ = 207317388. Its totient is φ = 138211584.

The previous prime is 172764467. The next prime is 172764491. The reversal of 172764485 is 584467271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 584467271 = 12011 ⋅48661.

It can be written as a sum of positive squares in 2 ways, for example, as 42211009 + 130553476 = 6497^2 + 11426^2 .

It is a cyclic number.

It is not a de Polignac number, because 172764485 - 2¹⁶ = 172698949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17276444 + ... + 17276453.

It is an arithmetic number, because the mean of its divisors is an integer number (51829347).

Almost surely, 2^172764485 is an apocalyptic number.

It is an amenable number.

172764485 is a deficient number, since it is larger than the sum of its proper divisors (34552903).

172764485 is an equidigital number, since it uses as much as digits as its factorization.

172764485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34552902.

The product of its digits is 376320, while the sum is 44.

The square root of 172764485 is about 13143.9904519138. The cubic root of 172764485 is about 556.9524986164.

The spelling of 172764485 in words is "one hundred seventy-two million, seven hundred sixty-four thousand, four hundred eighty-five".