172642367 has 4 divisors (see below), whose sum is σ = 173364960. Its totient is φ = 171919776.

The previous prime is 172642357. The next prime is 172642387. The reversal of 172642367 is 763246271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 763246271 = 5059 ⋅150869.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172642367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172642367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172642357) 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 3 ways as a sum of consecutive naturals, for example, 360938 + ... + 361415.

It is an arithmetic number, because the mean of its divisors is an integer number (43341240).

Almost surely, 2^172642367 is an apocalyptic number.

172642367 is a deficient number, since it is larger than the sum of its proper divisors (722593).

172642367 is an equidigital number, since it uses as much as digits as its factorization.

172642367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722592.

The product of its digits is 84672, while the sum is 38.

The square root of 172642367 is about 13139.3442378225. The cubic root of 172642367 is about 556.8212410132.

The spelling of 172642367 in words is "one hundred seventy-two million, six hundred forty-two thousand, three hundred sixty-seven".