78090009007 has 2 divisors, whose sum is σ = 78090009008. Its totient is φ = 78090009006.

The previous prime is 78090009001. The next prime is 78090009043. The reversal of 78090009007 is 70090009087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78090009007 - 2²³ = 78081620399 is a prime.

It is a super-2 number, since 2×78090009007² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78090009001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39045004503 + 39045004504.

It is an arithmetic number, because the mean of its divisors is an integer number (39045004504).

Almost surely, 2^78090009007 is an apocalyptic number.

78090009007 is a deficient number, since it is larger than the sum of its proper divisors (1).

78090009007 is an equidigital number, since it uses as much as digits as its factorization.

78090009007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 40.

The spelling of 78090009007 in words is "seventy-eight billion, ninety million, nine thousand, seven".