1970880389 has 2 divisors, whose sum is σ = 1970880390. Its totient is φ = 1970880388.

The previous prime is 1970880371. The next prime is 1970880391. The reversal of 1970880389 is 9830880791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1899477889 + 71402500 = 43583^2 + 8450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1970880389 - 2¹² = 1970876293 is a prime.

Together with 1970880391, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1970880389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1970880349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985440194 + 985440195.

It is an arithmetic number, because the mean of its divisors is an integer number (985440195).

Almost surely, 2^1970880389 is an apocalyptic number.

It is an amenable number.

1970880389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1970880389 is an equidigital number, since it uses as much as digits as its factorization.

1970880389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 53.

The square root of 1970880389 is about 44394.5986466822. The cubic root of 1970880389 is about 1253.7763958980.

The spelling of 1970880389 in words is "one billion, nine hundred seventy million, eight hundred eighty thousand, three hundred eighty-nine".