97279439 has 2 divisors, whose sum is σ = 97279440. Its totient is φ = 97279438.

The previous prime is 97279417. The next prime is 97279447. The reversal of 97279439 is 93497279.

It is a strong prime.

It is an emirp because it is prime and its reverse (93497279) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97279439 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97279499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48639719 + 48639720.

It is an arithmetic number, because the mean of its divisors is an integer number (48639720).

Almost surely, 2^97279439 is an apocalyptic number.

97279439 is a deficient number, since it is larger than the sum of its proper divisors (1).

97279439 is an equidigital number, since it uses as much as digits as its factorization.

97279439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 50.

The square root of 97279439 is about 9863.0339652665. The cubic root of 97279439 is about 459.9108822319.

The spelling of 97279439 in words is "ninety-seven million, two hundred seventy-nine thousand, four hundred thirty-nine".