70791649 has 2 divisors, whose sum is σ = 70791650. Its totient is φ = 70791648.

The previous prime is 70791647. The next prime is 70791671. The reversal of 70791649 is 94619707.

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., 43824400 + 26967249 = 6620^2 + 5193^2 .

It is a cyclic number.

It is not a de Polignac number, because 70791649 - 2¹ = 70791647 is a prime.

It is a super-2 number, since 2×70791649² = 10022915136278402, which contains 22 as substring.

Together with 70791647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (70791641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35395824 + 35395825.

It is an arithmetic number, because the mean of its divisors is an integer number (35395825).

Almost surely, 2^70791649 is an apocalyptic number.

It is an amenable number.

70791649 is a deficient number, since it is larger than the sum of its proper divisors (1).

70791649 is an equidigital number, since it uses as much as digits as its factorization.

70791649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 70791649 is about 8413.7773324471. Note that the first 3 decimals coincide. The cubic root of 70791649 is about 413.6763341862.

The spelling of 70791649 in words is "seventy million, seven hundred ninety-one thousand, six hundred forty-nine".