80742273 has 4 divisors (see below), whose sum is σ = 107656368. Its totient is φ = 53828180.

The previous prime is 80742269. The next prime is 80742281. The reversal of 80742273 is 37224708.

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 80742273 - 2² = 80742269 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80742253) 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, 13457043 + ... + 13457048.

It is an arithmetic number, because the mean of its divisors is an integer number (26914092).

Almost surely, 2^80742273 is an apocalyptic number.

It is an amenable number.

80742273 is a deficient number, since it is larger than the sum of its proper divisors (26914095).

80742273 is a wasteful number, since it uses less digits than its factorization.

80742273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26914094.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 80742273 is about 8985.6704257390. The cubic root of 80742273 is about 432.2154864166.

The spelling of 80742273 in words is "eighty million, seven hundred forty-two thousand, two hundred seventy-three".