79966973 has 2 divisors, whose sum is σ = 79966974. Its totient is φ = 79966972.

The previous prime is 79966969. The next prime is 79966987. The reversal of 79966973 is 37966997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62141689 + 17825284 = 7883^2 + 4222^2 .

It is a cyclic number.

It is not a de Polignac number, because 79966973 - 2² = 79966969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79966993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39983486 + 39983487.

It is an arithmetic number, because the mean of its divisors is an integer number (39983487).

Almost surely, 2^79966973 is an apocalyptic number.

It is an amenable number.

79966973 is a deficient number, since it is larger than the sum of its proper divisors (1).

79966973 is an equidigital number, since it uses as much as digits as its factorization.

79966973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3857868, while the sum is 56.

The square root of 79966973 is about 8942.4254539806. The cubic root of 79966973 is about 430.8276344160.

The spelling of 79966973 in words is "seventy-nine million, nine hundred sixty-six thousand, nine hundred seventy-three".