78930899 has 2 divisors, whose sum is σ = 78930900. Its totient is φ = 78930898.

The previous prime is 78930869. The next prime is 78930923. The reversal of 78930899 is 99803987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78930899 - 2¹² = 78926803 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78930899.

It is not a weakly prime, because it can be changed into another prime (78930809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39465449 + 39465450.

It is an arithmetic number, because the mean of its divisors is an integer number (39465450).

Almost surely, 2^78930899 is an apocalyptic number.

78930899 is a deficient number, since it is larger than the sum of its proper divisors (1).

78930899 is an equidigital number, since it uses as much as digits as its factorization.

78930899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 78930899 is about 8884.3063319541. The cubic root of 78930899 is about 428.9589001474.

The spelling of 78930899 in words is "seventy-eight million, nine hundred thirty thousand, eight hundred ninety-nine".