70945649 has 2 divisors, whose sum is σ = 70945650. Its totient is φ = 70945648.

The previous prime is 70945643. The next prime is 70945681. The reversal of 70945649 is 94654907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46512400 + 24433249 = 6820^2 + 4943^2 .

It is an emirp because it is prime and its reverse (94654907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70945649 - 2⁸ = 70945393 is a prime.

It is a super-2 number, since 2×70945649² = 10066570224062402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70945643) 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, 35472824 + 35472825.

It is an arithmetic number, because the mean of its divisors is an integer number (35472825).

Almost surely, 2^70945649 is an apocalyptic number.

It is an amenable number.

70945649 is a deficient number, since it is larger than the sum of its proper divisors (1).

70945649 is an equidigital number, since it uses as much as digits as its factorization.

70945649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 70945649 is about 8422.9240172282. The cubic root of 70945649 is about 413.9760871312.

The spelling of 70945649 in words is "seventy million, nine hundred forty-five thousand, six hundred forty-nine".