70708091 has 2 divisors, whose sum is σ = 70708092. Its totient is φ = 70708090.

The previous prime is 70708087. The next prime is 70708093. The reversal of 70708091 is 19080707.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70708091 - 2² = 70708087 is a prime.

Together with 70708093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70708093) 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, 35354045 + 35354046.

It is an arithmetic number, because the mean of its divisors is an integer number (35354046).

Almost surely, 2^70708091 is an apocalyptic number.

70708091 is a deficient number, since it is larger than the sum of its proper divisors (1).

70708091 is an equidigital number, since it uses as much as digits as its factorization.

70708091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 70708091 is about 8408.8103201345. The cubic root of 70708091 is about 413.5135109513.

Adding to 70708091 its reverse (19080707), we get a palindrome (89788798).

The spelling of 70708091 in words is "seventy million, seven hundred eight thousand, ninety-one".