83881389 has 4 divisors (see below), whose sum is σ = 111841856. Its totient is φ = 55920924.

The previous prime is 83881363. The next prime is 83881393. The reversal of 83881389 is 98318838.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 83881389 - 2¹² = 83877293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83881339) 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, 13980229 + ... + 13980234.

It is an arithmetic number, because the mean of its divisors is an integer number (27960464).

Almost surely, 2^83881389 is an apocalyptic number.

It is an amenable number.

83881389 is a deficient number, since it is larger than the sum of its proper divisors (27960467).

83881389 is a wasteful number, since it uses less digits than its factorization.

83881389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27960466.

The product of its digits is 331776, while the sum is 48.

The square root of 83881389 is about 9158.6783435166. The cubic root of 83881389 is about 437.7456823082.

The spelling of 83881389 in words is "eighty-three million, eight hundred eighty-one thousand, three hundred eighty-nine".