81924607 has 2 divisors, whose sum is σ = 81924608. Its totient is φ = 81924606.

The previous prime is 81924587. The next prime is 81924653. The reversal of 81924607 is 70642918.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81924607 - 2¹¹ = 81922559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81924677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40962303 + 40962304.

It is an arithmetic number, because the mean of its divisors is an integer number (40962304).

Almost surely, 2^81924607 is an apocalyptic number.

81924607 is a deficient number, since it is larger than the sum of its proper divisors (1).

81924607 is an equidigital number, since it uses as much as digits as its factorization.

81924607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 81924607 is about 9051.2212988082. The cubic root of 81924607 is about 434.3149599882.

The spelling of 81924607 in words is "eighty-one million, nine hundred twenty-four thousand, six hundred seven".