70220749 has 2 divisors, whose sum is σ = 70220750. Its totient is φ = 70220748.

The previous prime is 70220747. The next prime is 70220767. The reversal of 70220749 is 94702207.

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., 55398249 + 14822500 = 7443^2 + 3850^2 .

It is an emirp because it is prime and its reverse (94702207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70220749 - 2¹ = 70220747 is a prime.

Together with 70220747, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 70220749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70220747) 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, 35110374 + 35110375.

It is an arithmetic number, because the mean of its divisors is an integer number (35110375).

Almost surely, 2^70220749 is an apocalyptic number.

It is an amenable number.

70220749 is a deficient number, since it is larger than the sum of its proper divisors (1).

70220749 is an equidigital number, since it uses as much as digits as its factorization.

70220749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 70220749 is about 8379.7821570731. The cubic root of 70220749 is about 412.5612990017.

The spelling of 70220749 in words is "seventy million, two hundred twenty thousand, seven hundred forty-nine".