1970637989 has 2 divisors, whose sum is σ = 1970637990. Its totient is φ = 1970637988.

The previous prime is 1970637973. The next prime is 1970638049. The reversal of 1970637989 is 9897360791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1382575489 + 588062500 = 37183^2 + 24250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1970637989 - 2⁴ = 1970637973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1970637919) 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 as a sum of consecutive naturals, namely, 985318994 + 985318995.

It is an arithmetic number, because the mean of its divisors is an integer number (985318995).

Almost surely, 2^1970637989 is an apocalyptic number.

It is an amenable number.

1970637989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1970637989 is an equidigital number, since it uses as much as digits as its factorization.

1970637989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5143824, while the sum is 59.

The square root of 1970637989 is about 44391.8685008865. The cubic root of 1970637989 is about 1253.7249928363.

The spelling of 1970637989 in words is "one billion, nine hundred seventy million, six hundred thirty-seven thousand, nine hundred eighty-nine".