83642311 has 4 divisors (see below), whose sum is σ = 85902952. Its totient is φ = 81381672.

The previous prime is 83642297. The next prime is 83642347. The reversal of 83642311 is 11324638.

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 83642311 - 2⁹ = 83641799 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 83642311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83642711) 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, 1130265 + ... + 1130338.

It is an arithmetic number, because the mean of its divisors is an integer number (21475738).

Almost surely, 2^83642311 is an apocalyptic number.

83642311 is a deficient number, since it is larger than the sum of its proper divisors (2260641).

83642311 is a wasteful number, since it uses less digits than its factorization.

83642311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260640.

The product of its digits is 3456, while the sum is 28.

The square root of 83642311 is about 9145.6170376853. The cubic root of 83642311 is about 437.3294002601.

Adding to 83642311 its reverse (11324638), we get a palindrome (94966949).

The spelling of 83642311 in words is "eighty-three million, six hundred forty-two thousand, three hundred eleven".