70333721 has 2 divisors, whose sum is σ = 70333722. Its totient is φ = 70333720.

The previous prime is 70333717. The next prime is 70333829. The reversal of 70333721 is 12733307.

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., 39375625 + 30958096 = 6275^2 + 5564^2 .

It is an emirp because it is prime and its reverse (12733307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70333721 - 2² = 70333717 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70333321) 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, 35166860 + 35166861.

It is an arithmetic number, because the mean of its divisors is an integer number (35166861).

Almost surely, 2^70333721 is an apocalyptic number.

It is an amenable number.

70333721 is a deficient number, since it is larger than the sum of its proper divisors (1).

70333721 is an equidigital number, since it uses as much as digits as its factorization.

70333721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 26.

The square root of 70333721 is about 8386.5201961243. The cubic root of 70333721 is about 412.7824250156.

The spelling of 70333721 in words is "seventy million, three hundred thirty-three thousand, seven hundred twenty-one".