70986221 has 2 divisors, whose sum is σ = 70986222. Its totient is φ = 70986220.

The previous prime is 70986199. The next prime is 70986247. The reversal of 70986221 is 12268907.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59521225 + 11464996 = 7715^2 + 3386^2 .

It is a cyclic number.

It is not a de Polignac number, because 70986221 - 2¹⁴ = 70969837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70986281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35493110 + 35493111.

It is an arithmetic number, because the mean of its divisors is an integer number (35493111).

Almost surely, 2^70986221 is an apocalyptic number.

It is an amenable number.

70986221 is a deficient number, since it is larger than the sum of its proper divisors (1).

70986221 is an equidigital number, since it uses as much as digits as its factorization.

70986221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 70986221 is about 8425.3321002795. The cubic root of 70986221 is about 414.0549862009.

The spelling of 70986221 in words is "seventy million, nine hundred eighty-six thousand, two hundred twenty-one".