79894897 has 2 divisors, whose sum is σ = 79894898. Its totient is φ = 79894896.

The previous prime is 79894831. The next prime is 79894907. The reversal of 79894897 is 79849897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47279376 + 32615521 = 6876^2 + 5711^2 .

It is an emirp because it is prime and its reverse (79849897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79894897 - 2¹⁵ = 79862129 is a prime.

It is not a weakly prime, because it can be changed into another prime (79894807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39947448 + 39947449.

It is an arithmetic number, because the mean of its divisors is an integer number (39947449).

Almost surely, 2^79894897 is an apocalyptic number.

It is an amenable number.

79894897 is a deficient number, since it is larger than the sum of its proper divisors (1).

79894897 is an equidigital number, since it uses as much as digits as its factorization.

79894897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 61.

The square root of 79894897 is about 8938.3945426458. The cubic root of 79894897 is about 430.6981573520.

The spelling of 79894897 in words is "seventy-nine million, eight hundred ninety-four thousand, eight hundred ninety-seven".