78090479 has 2 divisors, whose sum is σ = 78090480. Its totient is φ = 78090478.

The previous prime is 78090449. The next prime is 78090491. The reversal of 78090479 is 97409087.

It is a strong prime.

It is an emirp because it is prime and its reverse (97409087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78090479 - 2¹² = 78086383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78090409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39045239 + 39045240.

It is an arithmetic number, because the mean of its divisors is an integer number (39045240).

Almost surely, 2^78090479 is an apocalyptic number.

78090479 is a deficient number, since it is larger than the sum of its proper divisors (1).

78090479 is an equidigital number, since it uses as much as digits as its factorization.

78090479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 78090479 is about 8836.8817464081. The cubic root of 78090479 is about 427.4310119744.

The spelling of 78090479 in words is "seventy-eight million, ninety thousand, four hundred seventy-nine".