77968747 has 2 divisors, whose sum is σ = 77968748. Its totient is φ = 77968746.

The previous prime is 77968741. The next prime is 77968753. The reversal of 77968747 is 74786977.

It is a balanced prime because it is at equal distance from previous prime (77968741) and next prime (77968753).

It is a cyclic number.

It is not a de Polignac number, because 77968747 - 2³ = 77968739 is a prime.

It is not a weakly prime, because it can be changed into another prime (77968741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38984373 + 38984374.

It is an arithmetic number, because the mean of its divisors is an integer number (38984374).

Almost surely, 2^77968747 is an apocalyptic number.

77968747 is a deficient number, since it is larger than the sum of its proper divisors (1).

77968747 is an equidigital number, since it uses as much as digits as its factorization.

77968747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4148928, while the sum is 55.

The square root of 77968747 is about 8829.9913363491. The cubic root of 77968747 is about 427.2087949901.

The spelling of 77968747 in words is "seventy-seven million, nine hundred sixty-eight thousand, seven hundred forty-seven".