77274643 has 2 divisors, whose sum is σ = 77274644. Its totient is φ = 77274642.

The previous prime is 77274623. The next prime is 77274649. The reversal of 77274643 is 34647277.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77274643 - 2¹⁷ = 77143571 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77274596 and 77274605.

It is not a weakly prime, because it can be changed into another prime (77274649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38637321 + 38637322.

It is an arithmetic number, because the mean of its divisors is an integer number (38637322).

Almost surely, 2^77274643 is an apocalyptic number.

77274643 is a deficient number, since it is larger than the sum of its proper divisors (1).

77274643 is an equidigital number, since it uses as much as digits as its factorization.

77274643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 40.

The square root of 77274643 is about 8790.5996951289. The cubic root of 77274643 is about 425.9372956118.

The spelling of 77274643 in words is "seventy-seven million, two hundred seventy-four thousand, six hundred forty-three".