77851141 has 2 divisors, whose sum is σ = 77851142. Its totient is φ = 77851140.

The previous prime is 77851139. The next prime is 77851153. The reversal of 77851141 is 14115877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60000516 + 17850625 = 7746^2 + 4225^2 .

It is a cyclic number.

It is not a de Polignac number, because 77851141 - 2¹ = 77851139 is a prime.

Together with 77851139, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 77851097 and 77851106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77851121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38925570 + 38925571.

It is an arithmetic number, because the mean of its divisors is an integer number (38925571).

Almost surely, 2^77851141 is an apocalyptic number.

It is an amenable number.

77851141 is a deficient number, since it is larger than the sum of its proper divisors (1).

77851141 is an equidigital number, since it uses as much as digits as its factorization.

77851141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 34.

The square root of 77851141 is about 8823.3293602812. The cubic root of 77851141 is about 426.9938900782.

The spelling of 77851141 in words is "seventy-seven million, eight hundred fifty-one thousand, one hundred forty-one".