172223293 has 6 divisors (see below), whose sum is σ = 189303422. Its totient is φ = 156566520.

The previous prime is 172223291. The next prime is 172223309. The reversal of 172223293 is 392322271.

It can be written as a sum of positive squares in only one way, i.e., 162256644 + 9966649 = 12738^2 + 3157^2 .

It is not a de Polignac number, because 172223293 - 2¹ = 172223291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172223291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 711546 + ... + 711787.

Almost surely, 2^172223293 is an apocalyptic number.

It is an amenable number.

172223293 is a deficient number, since it is larger than the sum of its proper divisors (17080129).

172223293 is a wasteful number, since it uses less digits than its factorization.

172223293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423355 (or 1423344 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The square root of 172223293 is about 13123.3872532971. The cubic root of 172223293 is about 556.3703312791.

The spelling of 172223293 in words is "one hundred seventy-two million, two hundred twenty-three thousand, two hundred ninety-three".