78762979 has 2 divisors, whose sum is σ = 78762980. Its totient is φ = 78762978.

The previous prime is 78762949. The next prime is 78763001. The reversal of 78762979 is 97926787.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78762979 - 2¹¹ = 78760931 is a prime.

It is not a weakly prime, because it can be changed into another prime (78762949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39381489 + 39381490.

It is an arithmetic number, because the mean of its divisors is an integer number (39381490).

Almost surely, 2^78762979 is an apocalyptic number.

78762979 is a deficient number, since it is larger than the sum of its proper divisors (1).

78762979 is an equidigital number, since it uses as much as digits as its factorization.

78762979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2667168, while the sum is 55.

The square root of 78762979 is about 8874.8509283255. The cubic root of 78762979 is about 428.6544907630.

The spelling of 78762979 in words is "seventy-eight million, seven hundred sixty-two thousand, nine hundred seventy-nine".