1995012489 has 8 divisors (see below), whose sum is σ = 2705101920. Its totient is φ = 1307465696.

The previous prime is 1995012473. The next prime is 1995012491. The reversal of 1995012489 is 9842105991.

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

It is a cyclic number.

It is not a de Polignac number, because 1995012489 - 2⁴ = 1995012473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1995012449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5635452 + ... + 5635805.

It is an arithmetic number, because the mean of its divisors is an integer number (338137740).

Almost surely, 2^1995012489 is an apocalyptic number.

It is an amenable number.

1995012489 is a deficient number, since it is larger than the sum of its proper divisors (710089431).

1995012489 is a wasteful number, since it uses less digits than its factorization.

1995012489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11271319.

The product of its (nonzero) digits is 233280, while the sum is 48.

The square root of 1995012489 is about 44665.5626741677. The cubic root of 1995012489 is about 1258.8728664244.

The spelling of 1995012489 in words is "one billion, nine hundred ninety-five million, twelve thousand, four hundred eighty-nine".