99812039 has 2 divisors, whose sum is σ = 99812040. Its totient is φ = 99812038.

The previous prime is 99812023. The next prime is 99812071. The reversal of 99812039 is 93021899.

It is a weak prime.

It is an emirp because it is prime and its reverse (93021899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99812039 - 2⁴ = 99812023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99811987 and 99812005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99812099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49906019 + 49906020.

It is an arithmetic number, because the mean of its divisors is an integer number (49906020).

Almost surely, 2^99812039 is an apocalyptic number.

99812039 is a deficient number, since it is larger than the sum of its proper divisors (1).

99812039 is an equidigital number, since it uses as much as digits as its factorization.

99812039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 99812039 is about 9990.5975296776. The cubic root of 99812039 is about 463.8678884065.

The spelling of 99812039 in words is "ninety-nine million, eight hundred twelve thousand, thirty-nine".