1970542789 has 2 divisors, whose sum is σ = 1970542790. Its totient is φ = 1970542788.

The previous prime is 1970542771. The next prime is 1970542793. The reversal of 1970542789 is 9872450791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1899477889 + 71064900 = 43583^2 + 8430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1970542789 - 2¹⁷ = 1970411717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1970542729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985271394 + 985271395.

It is an arithmetic number, because the mean of its divisors is an integer number (985271395).

Almost surely, 2^1970542789 is an apocalyptic number.

It is an amenable number.

1970542789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1970542789 is an equidigital number, since it uses as much as digits as its factorization.

1970542789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The square root of 1970542789 is about 44390.7962194868. The cubic root of 1970542789 is about 1253.7048036823.

The spelling of 1970542789 in words is "one billion, nine hundred seventy million, five hundred forty-two thousand, seven hundred eighty-nine".