81937883 has 2 divisors, whose sum is σ = 81937884. Its totient is φ = 81937882.

The previous prime is 81937879. The next prime is 81937897. The reversal of 81937883 is 38873918.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81937883 - 2² = 81937879 is a prime.

It is not a weakly prime, because it can be changed into another prime (81937813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40968941 + 40968942.

It is an arithmetic number, because the mean of its divisors is an integer number (40968942).

Almost surely, 2^81937883 is an apocalyptic number.

81937883 is a deficient number, since it is larger than the sum of its proper divisors (1).

81937883 is an equidigital number, since it uses as much as digits as its factorization.

81937883 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 81937883 is about 9051.9546507923. The cubic root of 81937883 is about 434.3384191750.

The spelling of 81937883 in words is "eighty-one million, nine hundred thirty-seven thousand, eight hundred eighty-three".