77486749 has 2 divisors, whose sum is σ = 77486750. Its totient is φ = 77486748.

The previous prime is 77486743. The next prime is 77486779. The reversal of 77486749 is 94768477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43322724 + 34164025 = 6582^2 + 5845^2 .

It is a cyclic number.

It is not a de Polignac number, because 77486749 - 2³ = 77486741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77486696 and 77486705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77486741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38743374 + 38743375.

It is an arithmetic number, because the mean of its divisors is an integer number (38743375).

Almost surely, 2^77486749 is an apocalyptic number.

It is an amenable number.

77486749 is a deficient number, since it is larger than the sum of its proper divisors (1).

77486749 is an equidigital number, since it uses as much as digits as its factorization.

77486749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2370816, while the sum is 52.

The square root of 77486749 is about 8802.6557924299. The cubic root of 77486749 is about 426.3266485256.

The spelling of 77486749 in words is "seventy-seven million, four hundred eighty-six thousand, seven hundred forty-nine".