83977849 has 4 divisors (see below), whose sum is σ = 84590964. Its totient is φ = 83364736.

The previous prime is 83977781. The next prime is 83977889. The reversal of 83977849 is 94877938.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94877938 = 2 ⋅47438969.

It can be written as a sum of positive squares in 2 ways, for example, as 58293225 + 25684624 = 7635^2 + 5068^2 .

It is a cyclic number.

It is not a de Polignac number, because 83977849 - 2⁷ = 83977721 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 83977849.

It is not an unprimeable number, because it can be changed into a prime (83977889) 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, 306352 + ... + 306625.

It is an arithmetic number, because the mean of its divisors is an integer number (21147741).

Almost surely, 2^83977849 is an apocalyptic number.

It is an amenable number.

83977849 is a deficient number, since it is larger than the sum of its proper divisors (613115).

83977849 is a wasteful number, since it uses less digits than its factorization.

83977849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613114.

The product of its digits is 3048192, while the sum is 55.

The square root of 83977849 is about 9163.9428741126. The cubic root of 83977849 is about 437.9134142836.

The spelling of 83977849 in words is "eighty-three million, nine hundred seventy-seven thousand, eight hundred forty-nine".