72642311 has 4 divisors (see below), whose sum is σ = 83019792. Its totient is φ = 62264832.

The previous prime is 72642299. The next prime is 72642313. The reversal of 72642311 is 11324627.

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

It is not a de Polignac number, because 72642311 - 2²⁶ = 5533447 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 (72642313) 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, 5188730 + ... + 5188743.

It is an arithmetic number, because the mean of its divisors is an integer number (20754948).

Almost surely, 2^72642311 is an apocalyptic number.

72642311 is a deficient number, since it is larger than the sum of its proper divisors (10377481).

72642311 is a wasteful number, since it uses less digits than its factorization.

72642311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10377480.

The product of its digits is 2016, while the sum is 26.

The square root of 72642311 is about 8523.0458757418. The cubic root of 72642311 is about 417.2501972971.

Adding to 72642311 its reverse (11324627), we get a palindrome (83966938).

The spelling of 72642311 in words is "seventy-two million, six hundred forty-two thousand, three hundred eleven".