785715971 has 2 divisors, whose sum is σ = 785715972. Its totient is φ = 785715970.

The previous prime is 785715899. The next prime is 785715977. The reversal of 785715971 is 179517587.

It is a strong prime.

It is an emirp because it is prime and its reverse (179517587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 785715971 - 2¹⁸ = 785453827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (785715977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392857985 + 392857986.

It is an arithmetic number, because the mean of its divisors is an integer number (392857986).

Almost surely, 2^785715971 is an apocalyptic number.

785715971 is a deficient number, since it is larger than the sum of its proper divisors (1).

785715971 is an equidigital number, since it uses as much as digits as its factorization.

785715971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 617400, while the sum is 50.

The square root of 785715971 is about 28030.6255905929. The cubic root of 785715971 is about 922.7595041605.

The spelling of 785715971 in words is "seven hundred eighty-five million, seven hundred fifteen thousand, nine hundred seventy-one".