71861963 has 2 divisors, whose sum is σ = 71861964. Its totient is φ = 71861962.

The previous prime is 71861953. The next prime is 71862017. The reversal of 71861963 is 36916817.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71861963 - 2⁴ = 71861947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71861963.

It is not a weakly prime, because it can be changed into another prime (71861953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35930981 + 35930982.

It is an arithmetic number, because the mean of its divisors is an integer number (35930982).

Almost surely, 2^71861963 is an apocalyptic number.

71861963 is a deficient number, since it is larger than the sum of its proper divisors (1).

71861963 is an equidigital number, since it uses as much as digits as its factorization.

71861963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 71861963 is about 8477.1435637248. The cubic root of 71861963 is about 415.7507347782.

The spelling of 71861963 in words is "seventy-one million, eight hundred sixty-one thousand, nine hundred sixty-three".