74777277979 has 2 divisors, whose sum is σ = 74777277980. Its totient is φ = 74777277978.

The previous prime is 74777277937. The next prime is 74777277997. The reversal of 74777277979 is 97977277747.

Together with next prime (74777277997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (97977277747) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74777277979 is a prime.

It is not a weakly prime, because it can be changed into another prime (74777277779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37388638989 + 37388638990.

It is an arithmetic number, because the mean of its divisors is an integer number (37388638990).

Almost surely, 2^74777277979 is an apocalyptic number.

74777277979 is a deficient number, since it is larger than the sum of its proper divisors (1).

74777277979 is an equidigital number, since it uses as much as digits as its factorization.

74777277979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 533655864, while the sum is 73.

The spelling of 74777277979 in words is "seventy-four billion, seven hundred seventy-seven million, two hundred seventy-seven thousand, nine hundred seventy-nine".