1989665074 has 8 divisors (see below), whose sum is σ = 3160056348. Its totient is φ = 936312960.

The previous prime is 1989665059. The next prime is 1989665077. The reversal of 1989665074 is 4705669891.

It can be written as a sum of positive squares in 2 ways, for example, as 1989606025 + 59049 = 44605^2 + 243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1989665077) 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, 29259747 + ... + 29259814.

Almost surely, 2^1989665074 is an apocalyptic number.

1989665074 is a deficient number, since it is larger than the sum of its proper divisors (1170391274).

1989665074 is a wasteful number, since it uses less digits than its factorization.

1989665074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58519580.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 1989665074 is about 44605.6619051887. The cubic root of 1989665074 is about 1257.7471025167.

The spelling of 1989665074 in words is "one billion, nine hundred eighty-nine million, six hundred sixty-five thousand, seventy-four".