78940963 has 2 divisors, whose sum is σ = 78940964. Its totient is φ = 78940962.

The previous prime is 78940933. The next prime is 78941011. The reversal of 78940963 is 36904987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78940963 - 2⁵ = 78940931 is a prime.

It is not a weakly prime, because it can be changed into another prime (78940913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39470481 + 39470482.

It is an arithmetic number, because the mean of its divisors is an integer number (39470482).

Almost surely, 2^78940963 is an apocalyptic number.

78940963 is a deficient number, since it is larger than the sum of its proper divisors (1).

78940963 is an equidigital number, since it uses as much as digits as its factorization.

78940963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 78940963 is about 8884.8727058974. The cubic root of 78940963 is about 428.9771306881.

The spelling of 78940963 in words is "seventy-eight million, nine hundred forty thousand, nine hundred sixty-three".