70969813 has 2 divisors, whose sum is σ = 70969814. Its totient is φ = 70969812.

The previous prime is 70969739. The next prime is 70969831. The reversal of 70969813 is 31896907.

Together with next prime (70969831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47087044 + 23882769 = 6862^2 + 4887^2 .

It is a cyclic number.

It is not a de Polignac number, because 70969813 - 2¹⁷ = 70838741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70969813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70969853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35484906 + 35484907.

It is an arithmetic number, because the mean of its divisors is an integer number (35484907).

Almost surely, 2^70969813 is an apocalyptic number.

It is an amenable number.

70969813 is a deficient number, since it is larger than the sum of its proper divisors (1).

70969813 is an equidigital number, since it uses as much as digits as its factorization.

70969813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 70969813 is about 8424.3583138421. The cubic root of 70969813 is about 414.0230817100.

The spelling of 70969813 in words is "seventy million, nine hundred sixty-nine thousand, eight hundred thirteen".