70543813 has 2 divisors, whose sum is σ = 70543814. Its totient is φ = 70543812.

The previous prime is 70543807. The next prime is 70543843. The reversal of 70543813 is 31834507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66308449 + 4235364 = 8143^2 + 2058^2 .

It is a cyclic number.

It is not a de Polignac number, because 70543813 - 2²¹ = 68446661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70543843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35271906 + 35271907.

It is an arithmetic number, because the mean of its divisors is an integer number (35271907).

Almost surely, 2^70543813 is an apocalyptic number.

It is an amenable number.

70543813 is a deficient number, since it is larger than the sum of its proper divisors (1).

70543813 is an equidigital number, since it uses as much as digits as its factorization.

70543813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 70543813 is about 8399.0364328297. The cubic root of 70543813 is about 413.1930202862.

The spelling of 70543813 in words is "seventy million, five hundred forty-three thousand, eight hundred thirteen".