83677681 has 4 divisors (see below), whose sum is σ = 83758500. Its totient is φ = 83596864.

The previous prime is 83677661. The next prime is 83677697. The reversal of 83677681 is 18677638.

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

It can be written as a sum of positive squares in 2 ways, for example, as 77000625 + 6677056 = 8775^2 + 2584^2 .

It is a cyclic number.

It is not a de Polignac number, because 83677681 - 2¹³ = 83669489 is a prime.

It is a super-2 number, since 2×83677681² = 14003908595075522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83677631) 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, 38836 + ... + 40933.

It is an arithmetic number, because the mean of its divisors is an integer number (20939625).

Almost surely, 2^83677681 is an apocalyptic number.

It is an amenable number.

83677681 is a deficient number, since it is larger than the sum of its proper divisors (80819).

83677681 is a wasteful number, since it uses less digits than its factorization.

83677681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80818.

The product of its digits is 338688, while the sum is 46.

The square root of 83677681 is about 9147.5505464578. The cubic root of 83677681 is about 437.3910363740.

The spelling of 83677681 in words is "eighty-three million, six hundred seventy-seven thousand, six hundred eighty-one".