79281073 has 4 divisors (see below), whose sum is σ = 80624880. Its totient is φ = 77937268.

The previous prime is 79281071. The next prime is 79281109. The reversal of 79281073 is 37018297.

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 79281073 - 2¹ = 79281071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79281071) 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, 671815 + ... + 671932.

It is an arithmetic number, because the mean of its divisors is an integer number (20156220).

Almost surely, 2^79281073 is an apocalyptic number.

It is an amenable number.

79281073 is a deficient number, since it is larger than the sum of its proper divisors (1343807).

79281073 is a wasteful number, since it uses less digits than its factorization.

79281073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343806.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 79281073 is about 8903.9919698975. The cubic root of 79281073 is about 429.5923177638.

The spelling of 79281073 in words is "seventy-nine million, two hundred eighty-one thousand, seventy-three".