78619459 has 2 divisors, whose sum is σ = 78619460. Its totient is φ = 78619458.

The previous prime is 78619399. The next prime is 78619469. The reversal of 78619459 is 95491687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78619459 - 2¹⁷ = 78488387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78619469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39309729 + 39309730.

It is an arithmetic number, because the mean of its divisors is an integer number (39309730).

Almost surely, 2^78619459 is an apocalyptic number.

78619459 is a deficient number, since it is larger than the sum of its proper divisors (1).

78619459 is an equidigital number, since it uses as much as digits as its factorization.

78619459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The square root of 78619459 is about 8866.7614719242. The cubic root of 78619459 is about 428.3939711711.

The spelling of 78619459 in words is "seventy-eight million, six hundred nineteen thousand, four hundred fifty-nine".