172000477 has 4 divisors (see below), whose sum is σ = 187636896. Its totient is φ = 156364060.

The previous prime is 172000471. The next prime is 172000487. The reversal of 172000477 is 774000271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172000477 - 2³ = 172000469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172000471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7818193 + ... + 7818214.

It is an arithmetic number, because the mean of its divisors is an integer number (46909224).

Almost surely, 2^172000477 is an apocalyptic number.

It is an amenable number.

172000477 is a deficient number, since it is larger than the sum of its proper divisors (15636419).

172000477 is a wasteful number, since it uses less digits than its factorization.

172000477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15636418.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 172000477 is about 13114.8952340459. The cubic root of 172000477 is about 556.1302907484.

The spelling of 172000477 in words is "one hundred seventy-two million, four hundred seventy-seven", and thus it is an aban number.