70278613 has 2 divisors, whose sum is σ = 70278614. Its totient is φ = 70278612.

The previous prime is 70278601. The next prime is 70278623. The reversal of 70278613 is 31687207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63632529 + 6646084 = 7977^2 + 2578^2 .

It is a cyclic number.

It is not a de Polignac number, because 70278613 - 2¹⁷ = 70147541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70278623) 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, 35139306 + 35139307.

It is an arithmetic number, because the mean of its divisors is an integer number (35139307).

Almost surely, 2^70278613 is an apocalyptic number.

It is an amenable number.

70278613 is a deficient number, since it is larger than the sum of its proper divisors (1).

70278613 is an equidigital number, since it uses as much as digits as its factorization.

70278613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 70278613 is about 8383.2340418242. The cubic root of 70278613 is about 412.6745888443.

The spelling of 70278613 in words is "seventy million, two hundred seventy-eight thousand, six hundred thirteen".