83391427 has 4 divisors (see below), whose sum is σ = 95304496. Its totient is φ = 71478360.

The previous prime is 83391397. The next prime is 83391439. The reversal of 83391427 is 72419338.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72419338 = 2 ⋅36209669.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83391427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83392427) 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, 5956524 + ... + 5956537.

It is an arithmetic number, because the mean of its divisors is an integer number (23826124).

Almost surely, 2^83391427 is an apocalyptic number.

83391427 is a deficient number, since it is larger than the sum of its proper divisors (11913069).

83391427 is a wasteful number, since it uses less digits than its factorization.

83391427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11913068.

The product of its digits is 36288, while the sum is 37.

The square root of 83391427 is about 9131.8906585657. The cubic root of 83391427 is about 436.8917077761.

The spelling of 83391427 in words is "eighty-three million, three hundred ninety-one thousand, four hundred twenty-seven".