70715861 has 2 divisors, whose sum is σ = 70715862. Its totient is φ = 70715860.

The previous prime is 70715839. The next prime is 70715881. The reversal of 70715861 is 16851707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70392100 + 323761 = 8390^2 + 569^2 .

It is an emirp because it is prime and its reverse (16851707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70715861 - 2¹⁸ = 70453717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70715881) 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, 35357930 + 35357931.

It is an arithmetic number, because the mean of its divisors is an integer number (35357931).

Almost surely, 2^70715861 is an apocalyptic number.

It is an amenable number.

70715861 is a deficient number, since it is larger than the sum of its proper divisors (1).

70715861 is an equidigital number, since it uses as much as digits as its factorization.

70715861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 70715861 is about 8409.2723228589. The cubic root of 70715861 is about 413.5286571778.

The spelling of 70715861 in words is "seventy million, seven hundred fifteen thousand, eight hundred sixty-one".