80436739 has 4 divisors (see below), whose sum is σ = 80507656. Its totient is φ = 80365824.

The previous prime is 80436737. The next prime is 80436743. The reversal of 80436739 is 93763408.

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

It is a cyclic number.

It is not a de Polignac number, because 80436739 - 2¹ = 80436737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80436737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33729 + ... + 36034.

It is an arithmetic number, because the mean of its divisors is an integer number (20126914).

Almost surely, 2^80436739 is an apocalyptic number.

80436739 is a deficient number, since it is larger than the sum of its proper divisors (70917).

80436739 is a wasteful number, since it uses less digits than its factorization.

80436739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70916.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 80436739 is about 8968.6531318811. The cubic root of 80436739 is about 431.6696201571.

The spelling of 80436739 in words is "eighty million, four hundred thirty-six thousand, seven hundred thirty-nine".