78497479 has 2 divisors, whose sum is σ = 78497480. Its totient is φ = 78497478.

The previous prime is 78497437. The next prime is 78497509. The reversal of 78497479 is 97479487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78497479 - 2⁷ = 78497351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78497779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39248739 + 39248740.

It is an arithmetic number, because the mean of its divisors is an integer number (39248740).

Almost surely, 2^78497479 is an apocalyptic number.

78497479 is a deficient number, since it is larger than the sum of its proper divisors (1).

78497479 is an equidigital number, since it uses as much as digits as its factorization.

78497479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3556224, while the sum is 55.

The square root of 78497479 is about 8859.8803039319. The cubic root of 78497479 is about 428.1723019397.

The spelling of 78497479 in words is "seventy-eight million, four hundred ninety-seven thousand, four hundred seventy-nine".