71159783 has 2 divisors, whose sum is σ = 71159784. Its totient is φ = 71159782.

The previous prime is 71159747. The next prime is 71159789. The reversal of 71159783 is 38795117.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71159783 - 2⁶ = 71159719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71159783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71159789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35579891 + 35579892.

It is an arithmetic number, because the mean of its divisors is an integer number (35579892).

Almost surely, 2^71159783 is an apocalyptic number.

71159783 is a deficient number, since it is larger than the sum of its proper divisors (1).

71159783 is an equidigital number, since it uses as much as digits as its factorization.

71159783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 41.

The square root of 71159783 is about 8435.6258214788. The cubic root of 71159783 is about 414.3921677007.

The spelling of 71159783 in words is "seventy-one million, one hundred fifty-nine thousand, seven hundred eighty-three".