83881811 has 4 divisors (see below), whose sum is σ = 90334272. Its totient is φ = 77429352.

The previous prime is 83881807. The next prime is 83881823. The reversal of 83881811 is 11818838.

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

It is not a de Polignac number, because 83881811 - 2² = 83881807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83886811) 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, 3226211 + ... + 3226236.

It is an arithmetic number, because the mean of its divisors is an integer number (22583568).

Almost surely, 2^83881811 is an apocalyptic number.

83881811 is a deficient number, since it is larger than the sum of its proper divisors (6452461).

83881811 is a wasteful number, since it uses less digits than its factorization.

83881811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452460.

The product of its digits is 12288, while the sum is 38.

The square root of 83881811 is about 9158.7013817462. The cubic root of 83881811 is about 437.7464163939.

The spelling of 83881811 in words is "eighty-three million, eight hundred eighty-one thousand, eight hundred eleven".