172251889 has 8 divisors (see below), whose sum is σ = 174062952. Its totient is φ = 170446080.

The previous prime is 172251887. The next prime is 172251931. The reversal of 172251889 is 988152271.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16875664 + 155376225 = 4108^2 + 12465^2 .

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 172251889 - 2¹ = 172251887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172251887) 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, 114627 + ... + 116119.

It is an arithmetic number, because the mean of its divisors is an integer number (21757869).

Almost surely, 2^172251889 is an apocalyptic number.

It is an amenable number.

172251889 is a deficient number, since it is larger than the sum of its proper divisors (1811063).

172251889 is a wasteful number, since it uses less digits than its factorization.

172251889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627.

The product of its digits is 80640, while the sum is 43.

The square root of 172251889 is about 13124.4767133779. The cubic root of 172251889 is about 556.4011228661.

The spelling of 172251889 in words is "one hundred seventy-two million, two hundred fifty-one thousand, eight hundred eighty-nine".