78791527 has 2 divisors, whose sum is σ = 78791528. Its totient is φ = 78791526.

The previous prime is 78791507. The next prime is 78791543. The reversal of 78791527 is 72519787.

It is a strong prime.

It is an emirp because it is prime and its reverse (72519787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78791527 - 2¹⁵ = 78758759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78791507) 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, 39395763 + 39395764.

It is an arithmetic number, because the mean of its divisors is an integer number (39395764).

Almost surely, 2^78791527 is an apocalyptic number.

78791527 is a deficient number, since it is larger than the sum of its proper divisors (1).

78791527 is an equidigital number, since it uses as much as digits as its factorization.

78791527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 46.

The square root of 78791527 is about 8876.4591476557. The cubic root of 78791527 is about 428.7062737638.

The spelling of 78791527 in words is "seventy-eight million, seven hundred ninety-one thousand, five hundred twenty-seven".