1970061889 has 4 divisors (see below), whose sum is σ = 1970996356. Its totient is φ = 1969127424.

The previous prime is 1970061869. The next prime is 1970061937. The reversal of 1970061889 is 9881600791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9881600791 = 23 ⋅429634817.

It can be written as a sum of positive squares in 2 ways, for example, as 228251664 + 1741810225 = 15108^2 + 41735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1970061889 - 2⁵ = 1970061857 is a prime.

It is a super-2 number, since 2×1970061889² = 7762287692980496642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1970061869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464064 + ... + 468289.

It is an arithmetic number, because the mean of its divisors is an integer number (492749089).

Almost surely, 2^1970061889 is an apocalyptic number.

It is an amenable number.

1970061889 is a deficient number, since it is larger than the sum of its proper divisors (934467).

1970061889 is an equidigital number, since it uses as much as digits as its factorization.

1970061889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934466.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 1970061889 is about 44385.3792255963. The cubic root of 1970061889 is about 1253.6028088249.

The spelling of 1970061889 in words is "one billion, nine hundred seventy million, sixty-one thousand, eight hundred eighty-nine".