80138849 has 4 divisors (see below), whose sum is σ = 91587264. Its totient is φ = 68690436.

The previous prime is 80138843. The next prime is 80138869. The reversal of 80138849 is 94883108.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80138849 - 2²⁴ = 63361633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80138843) 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, 5724197 + ... + 5724210.

It is an arithmetic number, because the mean of its divisors is an integer number (22896816).

Almost surely, 2^80138849 is an apocalyptic number.

It is an amenable number.

80138849 is a deficient number, since it is larger than the sum of its proper divisors (11448415).

80138849 is a wasteful number, since it uses less digits than its factorization.

80138849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11448414.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 80138849 is about 8952.0304400734. The cubic root of 80138849 is about 431.1360781769.

The spelling of 80138849 in words is "eighty million, one hundred thirty-eight thousand, eight hundred forty-nine".