1970116997 has 4 divisors (see below), whose sum is σ = 1971742380. Its totient is φ = 1968491616.

The previous prime is 1970116963. The next prime is 1970117033. The reversal of 1970116997 is 7996110791.

It is a Cunningham number, because it is equal to 44386²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80389156 + 1889727841 = 8966^2 + 43471^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1970116997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1970116397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810872 + ... + 813297.

It is an arithmetic number, because the mean of its divisors is an integer number (492935595).

Almost surely, 2^1970116997 is an apocalyptic number.

It is an amenable number.

1970116997 is a deficient number, since it is larger than the sum of its proper divisors (1625383).

1970116997 is a wasteful number, since it uses less digits than its factorization.

1970116997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625382.

The product of its (nonzero) digits is 214326, while the sum is 50.

The square root of 1970116997 is about 44386.0000112648. Note that the first 4 decimals coincide. The cubic root of 1970116997 is about 1253.6144976116.

The spelling of 1970116997 in words is "one billion, nine hundred seventy million, one hundred sixteen thousand, nine hundred ninety-seven".