79985441 has 2 divisors, whose sum is σ = 79985442. Its totient is φ = 79985440.

The previous prime is 79985431. The next prime is 79985449. The reversal of 79985441 is 14458997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47541025 + 32444416 = 6895^2 + 5696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79985441 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (79985449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39992720 + 39992721.

It is an arithmetic number, because the mean of its divisors is an integer number (39992721).

Almost surely, 2^79985441 is an apocalyptic number.

It is an amenable number.

79985441 is a deficient number, since it is larger than the sum of its proper divisors (1).

79985441 is an equidigital number, since it uses as much as digits as its factorization.

79985441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 79985441 is about 8943.4580001250. The cubic root of 79985441 is about 430.8607977417.

The spelling of 79985441 in words is "seventy-nine million, nine hundred eighty-five thousand, four hundred forty-one".