77414861 has 2 divisors, whose sum is σ = 77414862. Its totient is φ = 77414860.

The previous prime is 77414837. The next prime is 77414863. The reversal of 77414861 is 16841477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52113961 + 25300900 = 7219^2 + 5030^2 .

It is a cyclic number.

It is not a de Polignac number, because 77414861 - 2¹⁸ = 77152717 is a prime.

It is a Sophie Germain prime.

Together with 77414863, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77414863) 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, 38707430 + 38707431.

It is an arithmetic number, because the mean of its divisors is an integer number (38707431).

Almost surely, 2^77414861 is an apocalyptic number.

It is an amenable number.

77414861 is a deficient number, since it is larger than the sum of its proper divisors (1).

77414861 is an equidigital number, since it uses as much as digits as its factorization.

77414861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 38.

The square root of 77414861 is about 8798.5715317886. The cubic root of 77414861 is about 426.1947668247.

The spelling of 77414861 in words is "seventy-seven million, four hundred fourteen thousand, eight hundred sixty-one".