70747309 has 2 divisors, whose sum is σ = 70747310. Its totient is φ = 70747308.

The previous prime is 70747297. The next prime is 70747321. The reversal of 70747309 is 90374707.

It is a balanced prime because it is at equal distance from previous prime (70747297) and next prime (70747321).

It can be written as a sum of positive squares in only one way, i.e., 70610409 + 136900 = 8403^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 70747309 - 2⁵ = 70747277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70747399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35373654 + 35373655.

It is an arithmetic number, because the mean of its divisors is an integer number (35373655).

Almost surely, 2^70747309 is an apocalyptic number.

It is an amenable number.

70747309 is a deficient number, since it is larger than the sum of its proper divisors (1).

70747309 is an equidigital number, since it uses as much as digits as its factorization.

70747309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37044, while the sum is 37.

The square root of 70747309 is about 8411.1419557632. The cubic root of 70747309 is about 413.5899481044.

The spelling of 70747309 in words is "seventy million, seven hundred forty-seven thousand, three hundred nine".