172433427 has 4 divisors (see below), whose sum is σ = 229911240. Its totient is φ = 114955616.

The previous prime is 172433423. The next prime is 172433447. The reversal of 172433427 is 724334271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172433427 - 2² = 172433423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172433423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28738902 + ... + 28738907.

It is an arithmetic number, because the mean of its divisors is an integer number (57477810).

Almost surely, 2^172433427 is an apocalyptic number.

172433427 is a deficient number, since it is larger than the sum of its proper divisors (57477813).

172433427 is an equidigital number, since it uses as much as digits as its factorization.

172433427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57477812.

The product of its digits is 28224, while the sum is 33.

The square root of 172433427 is about 13131.3909011955. The cubic root of 172433427 is about 556.5965198203.

Adding to 172433427 its reverse (724334271), we get a palindrome (896767698).

The spelling of 172433427 in words is "one hundred seventy-two million, four hundred thirty-three thousand, four hundred twenty-seven".