78099023 has 2 divisors, whose sum is σ = 78099024. Its totient is φ = 78099022.

The previous prime is 78099011. The next prime is 78099041. The reversal of 78099023 is 32099087.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78099023 is a prime.

It is a Sophie Germain prime.

It is equal to p_4564982 and since 78099023 and 4564982 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78099083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39049511 + 39049512.

It is an arithmetic number, because the mean of its divisors is an integer number (39049512).

Almost surely, 2^78099023 is an apocalyptic number.

78099023 is a deficient number, since it is larger than the sum of its proper divisors (1).

78099023 is an equidigital number, since it uses as much as digits as its factorization.

78099023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 78099023 is about 8837.3651616305. The cubic root of 78099023 is about 427.4466000352.

The spelling of 78099023 in words is "seventy-eight million, ninety-nine thousand, twenty-three".