78606499 has 2 divisors, whose sum is σ = 78606500. Its totient is φ = 78606498.

The previous prime is 78606497. The next prime is 78606503. The reversal of 78606499 is 99460687.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78606499 - 2¹ = 78606497 is a prime.

Together with 78606497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78606497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39303249 + 39303250.

It is an arithmetic number, because the mean of its divisors is an integer number (39303250).

Almost surely, 2^78606499 is an apocalyptic number.

78606499 is a deficient number, since it is larger than the sum of its proper divisors (1).

78606499 is an equidigital number, since it uses as much as digits as its factorization.

78606499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 78606499 is about 8866.0306225503. The cubic root of 78606499 is about 428.3704303877.

The spelling of 78606499 in words is "seventy-eight million, six hundred six thousand, four hundred ninety-nine".