78734099 has 2 divisors, whose sum is σ = 78734100. Its totient is φ = 78734098.

The previous prime is 78734069. The next prime is 78734111. The reversal of 78734099 is 99043787.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78734099 - 2¹⁶ = 78668563 is a prime.

It is not a weakly prime, because it can be changed into another prime (78734059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39367049 + 39367050.

It is an arithmetic number, because the mean of its divisors is an integer number (39367050).

Almost surely, 2^78734099 is an apocalyptic number.

78734099 is a deficient number, since it is larger than the sum of its proper divisors (1).

78734099 is an equidigital number, since it uses as much as digits as its factorization.

78734099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 78734099 is about 8873.2237095658. The cubic root of 78734099 is about 428.6020928165.

The spelling of 78734099 in words is "seventy-eight million, seven hundred thirty-four thousand, ninety-nine".