81692827 has 2 divisors, whose sum is σ = 81692828. Its totient is φ = 81692826.

The previous prime is 81692771. The next prime is 81692839. The reversal of 81692827 is 72829618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81692827 - 2¹⁹ = 81168539 is a prime.

It is not a weakly prime, because it can be changed into another prime (81692857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40846413 + 40846414.

It is an arithmetic number, because the mean of its divisors is an integer number (40846414).

Almost surely, 2^81692827 is an apocalyptic number.

81692827 is a deficient number, since it is larger than the sum of its proper divisors (1).

81692827 is an equidigital number, since it uses as much as digits as its factorization.

81692827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The square root of 81692827 is about 9038.4084329045. The cubic root of 81692827 is about 433.9049870938.

The spelling of 81692827 in words is "eighty-one million, six hundred ninety-two thousand, eight hundred twenty-seven".