291340079 has 2 divisors, whose sum is σ = 291340080. Its totient is φ = 291340078.

The previous prime is 291340073. The next prime is 291340097. The reversal of 291340079 is 970043192.

Together with next prime (291340097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-291340079 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 (291340073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145670039 + 145670040.

It is an arithmetic number, because the mean of its divisors is an integer number (145670040).

Almost surely, 2^291340079 is an apocalyptic number.

291340079 is a deficient number, since it is larger than the sum of its proper divisors (1).

291340079 is an equidigital number, since it uses as much as digits as its factorization.

291340079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 291340079 is about 17068.6870906933. The cubic root of 291340079 is about 662.9285829647.

The spelling of 291340079 in words is "two hundred ninety-one million, three hundred forty thousand, seventy-nine".