1921465489 has 8 divisors (see below), whose sum is σ = 1931398560. Its totient is φ = 1911547296.

The previous prime is 1921465457. The next prime is 1921465493. The reversal of 1921465489 is 9845641291.

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 1921465489 - 2⁵ = 1921465457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1921462489) 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, 329602 + ... + 335380.

It is an arithmetic number, because the mean of its divisors is an integer number (241424820).

Almost surely, 2^1921465489 is an apocalyptic number.

It is an amenable number.

1921465489 is a deficient number, since it is larger than the sum of its proper divisors (9933071).

1921465489 is a wasteful number, since it uses less digits than its factorization.

1921465489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7439.

The product of its digits is 622080, while the sum is 49.

The square root of 1921465489 is about 43834.5239394704. The cubic root of 1921465489 is about 1243.2091452284.

The spelling of 1921465489 in words is "one billion, nine hundred twenty-one million, four hundred sixty-five thousand, four hundred eighty-nine".