78496387 has 2 divisors, whose sum is σ = 78496388. Its totient is φ = 78496386.

The previous prime is 78496367. The next prime is 78496409. The reversal of 78496387 is 78369487.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78496387 is a prime.

It is not a weakly prime, because it can be changed into another prime (78496307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39248193 + 39248194.

It is an arithmetic number, because the mean of its divisors is an integer number (39248194).

Almost surely, 2^78496387 is an apocalyptic number.

78496387 is a deficient number, since it is larger than the sum of its proper divisors (1).

78496387 is an equidigital number, since it uses as much as digits as its factorization.

78496387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The square root of 78496387 is about 8859.8186776028. The cubic root of 78496387 is about 428.1703164563.

The spelling of 78496387 in words is "seventy-eight million, four hundred ninety-six thousand, three hundred eighty-seven".