83681739 has 6 divisors (see below), whose sum is σ = 120873636. Its totient is φ = 55787820.

The previous prime is 83681737. The next prime is 83681743. The reversal of 83681739 is 93718638.

It is a happy number.

It is not a de Polignac number, because 83681739 - 2¹ = 83681737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83681694 and 83681703.

It is not an unprimeable number, because it can be changed into a prime (83681737) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4648977 + ... + 4648994.

It is an arithmetic number, because the mean of its divisors is an integer number (20145606).

Almost surely, 2^83681739 is an apocalyptic number.

83681739 is a deficient number, since it is larger than the sum of its proper divisors (37191897).

83681739 is a wasteful number, since it uses less digits than its factorization.

83681739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9297977 (or 9297974 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 83681739 is about 9147.7723517805. The cubic root of 83681739 is about 437.3981067744.

The spelling of 83681739 in words is "eighty-three million, six hundred eighty-one thousand, seven hundred thirty-nine".