81614699 has 2 divisors, whose sum is σ = 81614700. Its totient is φ = 81614698.

The previous prime is 81614693. The next prime is 81614779. The reversal of 81614699 is 99641618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81614699 - 2⁴ = 81614683 is a prime.

It is not a weakly prime, because it can be changed into another prime (81614693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40807349 + 40807350.

It is an arithmetic number, because the mean of its divisors is an integer number (40807350).

Almost surely, 2^81614699 is an apocalyptic number.

81614699 is a deficient number, since it is larger than the sum of its proper divisors (1).

81614699 is an equidigital number, since it uses as much as digits as its factorization.

81614699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 44.

The square root of 81614699 is about 9034.0853991979. The cubic root of 81614699 is about 433.7666194110.

The spelling of 81614699 in words is "eighty-one million, six hundred fourteen thousand, six hundred ninety-nine".