79999973 has 2 divisors, whose sum is σ = 79999974. Its totient is φ = 79999972.

The previous prime is 79999879. The next prime is 79999981. The reversal of 79999973 is 37999997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73839649 + 6160324 = 8593^2 + 2482^2 .

It is a cyclic number.

It is not a de Polignac number, because 79999973 - 2¹⁸ = 79737829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79999573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39999986 + 39999987.

It is an arithmetic number, because the mean of its divisors is an integer number (39999987).

Almost surely, 2^79999973 is an apocalyptic number.

It is an amenable number.

79999973 is a deficient number, since it is larger than the sum of its proper divisors (1).

79999973 is an equidigital number, since it uses as much as digits as its factorization.

79999973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8680203, while the sum is 62.

The square root of 79999973 is about 8944.2704006531. The cubic root of 79999973 is about 430.8868895316.

It can be divided in two parts, 7999997 and 3, that added together give a cube (8000000 = 200³).

The spelling of 79999973 in words is "seventy-nine million, nine hundred ninety-nine thousand, nine hundred seventy-three".