70064581 has 2 divisors, whose sum is σ = 70064582. Its totient is φ = 70064580.

The previous prime is 70064573. The next prime is 70064623. The reversal of 70064581 is 18546007.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61308900 + 8755681 = 7830^2 + 2959^2 .

It is an emirp because it is prime and its reverse (18546007) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70064581 - 2³ = 70064573 is a prime.

It is a super-2 number, since 2×70064581² = 9818091021411122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70064521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35032290 + 35032291.

It is an arithmetic number, because the mean of its divisors is an integer number (35032291).

Almost surely, 2^70064581 is an apocalyptic number.

It is an amenable number.

70064581 is a deficient number, since it is larger than the sum of its proper divisors (1).

70064581 is an equidigital number, since it uses as much as digits as its factorization.

70064581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 70064581 is about 8370.4588285231. The cubic root of 70064581 is about 412.2552323223.

The spelling of 70064581 in words is "seventy million, sixty-four thousand, five hundred eighty-one".