71564783 has 2 divisors, whose sum is σ = 71564784. Its totient is φ = 71564782.

The previous prime is 71564743. The next prime is 71564809. The reversal of 71564783 is 38746517.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71564783 - 2¹⁶ = 71499247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71564783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71564743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35782391 + 35782392.

It is an arithmetic number, because the mean of its divisors is an integer number (35782392).

Almost surely, 2^71564783 is an apocalyptic number.

71564783 is a deficient number, since it is larger than the sum of its proper divisors (1).

71564783 is an equidigital number, since it uses as much as digits as its factorization.

71564783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 71564783 is about 8459.5970944248. The cubic root of 71564783 is about 415.1768404899.

The spelling of 71564783 in words is "seventy-one million, five hundred sixty-four thousand, seven hundred eighty-three".