805980971 has 2 divisors, whose sum is σ = 805980972. Its totient is φ = 805980970.

The previous prime is 805980943. The next prime is 805980977. The reversal of 805980971 is 179089508.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 805980971 - 2⁶ = 805980907 is a prime.

It is a super-2 number, since 2×805980971² = 1299210651228205682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (805980977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402990485 + 402990486.

It is an arithmetic number, because the mean of its divisors is an integer number (402990486).

Almost surely, 2^805980971 is an apocalyptic number.

805980971 is a deficient number, since it is larger than the sum of its proper divisors (1).

805980971 is an equidigital number, since it uses as much as digits as its factorization.

805980971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 805980971 is about 28389.8039972100. The cubic root of 805980971 is about 930.6254593244.

The spelling of 805980971 in words is "eight hundred five million, nine hundred eighty thousand, nine hundred seventy-one".