77701004947 has 2 divisors, whose sum is σ = 77701004948. Its totient is φ = 77701004946.

The previous prime is 77701004917. The next prime is 77701005049. The reversal of 77701004947 is 74940010777.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77701004947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77701004897 and 77701004906.

It is not a weakly prime, because it can be changed into another prime (77701004917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38850502473 + 38850502474.

It is an arithmetic number, because the mean of its divisors is an integer number (38850502474).

Almost surely, 2^77701004947 is an apocalyptic number.

77701004947 is a deficient number, since it is larger than the sum of its proper divisors (1).

77701004947 is an equidigital number, since it uses as much as digits as its factorization.

77701004947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345744, while the sum is 46.

The spelling of 77701004947 in words is "seventy-seven billion, seven hundred one million, four thousand, nine hundred forty-seven".