1970718881 has 2 divisors, whose sum is σ = 1970718882. Its totient is φ = 1970718880.

The previous prime is 1970718859. The next prime is 1970718917. The reversal of 1970718881 is 1888170791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1853733025 + 116985856 = 43055^2 + 10816^2 .

It is a cyclic number.

It is not a de Polignac number, because 1970718881 - 2¹⁰ = 1970717857 is a prime.

It is a super-2 number, since 2×1970718881² = 7767465815859784322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1970718781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985359440 + 985359441.

It is an arithmetic number, because the mean of its divisors is an integer number (985359441).

Almost surely, 2^1970718881 is an apocalyptic number.

It is an amenable number.

1970718881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1970718881 is an equidigital number, since it uses as much as digits as its factorization.

1970718881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 50.

The square root of 1970718881 is about 44392.7796043456. The cubic root of 1970718881 is about 1253.7421471682.

The spelling of 1970718881 in words is "one billion, nine hundred seventy million, seven hundred eighteen thousand, eight hundred eighty-one".