81935963 has 2 divisors, whose sum is σ = 81935964. Its totient is φ = 81935962.

The previous prime is 81935957. The next prime is 81935977. The reversal of 81935963 is 36953918.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81935963 - 2¹² = 81931867 is a prime.

It is not a weakly prime, because it can be changed into another prime (81935983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40967981 + 40967982.

It is an arithmetic number, because the mean of its divisors is an integer number (40967982).

Almost surely, 2^81935963 is an apocalyptic number.

81935963 is a deficient number, since it is larger than the sum of its proper divisors (1).

81935963 is an equidigital number, since it uses as much as digits as its factorization.

81935963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 44.

The square root of 81935963 is about 9051.8485957289. The cubic root of 81935963 is about 434.3350266202.

The spelling of 81935963 in words is "eighty-one million, nine hundred thirty-five thousand, nine hundred sixty-three".