78692479 has 2 divisors, whose sum is σ = 78692480. Its totient is φ = 78692478.

The previous prime is 78692461. The next prime is 78692491. The reversal of 78692479 is 97429687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78692479 - 2⁵ = 78692447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78692459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39346239 + 39346240.

It is an arithmetic number, because the mean of its divisors is an integer number (39346240).

Almost surely, 2^78692479 is an apocalyptic number.

78692479 is a deficient number, since it is larger than the sum of its proper divisors (1).

78692479 is an equidigital number, since it uses as much as digits as its factorization.

78692479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 52.

The square root of 78692479 is about 8870.8781414243. The cubic root of 78692479 is about 428.5265577202.

The spelling of 78692479 in words is "seventy-eight million, six hundred ninety-two thousand, four hundred seventy-nine".