78835481 has 2 divisors, whose sum is σ = 78835482. Its totient is φ = 78835480.

The previous prime is 78835457. The next prime is 78835517. The reversal of 78835481 is 18453887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72505225 + 6330256 = 8515^2 + 2516^2 .

It is an emirp because it is prime and its reverse (18453887) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78835481 is a prime.

It is a super-2 number, since 2×78835481² = 12430066129002722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78835381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39417740 + 39417741.

It is an arithmetic number, because the mean of its divisors is an integer number (39417741).

Almost surely, 2^78835481 is an apocalyptic number.

It is an amenable number.

78835481 is a deficient number, since it is larger than the sum of its proper divisors (1).

78835481 is an equidigital number, since it uses as much as digits as its factorization.

78835481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 44.

The square root of 78835481 is about 8878.9346770882. The cubic root of 78835481 is about 428.7859771423.

The spelling of 78835481 in words is "seventy-eight million, eight hundred thirty-five thousand, four hundred eighty-one".