1019716489 has 9 divisors (see below), whose sum is σ = 1121231629. Its totient is φ = 926695660.

The previous prime is 1019716471. The next prime is 1019716501. The reversal of 1019716489 is 9846179101.

The square root of 1019716489 is 31933.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1019716489 - 2²³ = 1011327881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1019716429) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 349812 + ... + 352714.

Almost surely, 2^1019716489 is an apocalyptic number.

1019716489 is the 31933-rd square number.

1019716489 is the 15967-th centered octagonal number.

It is an amenable number.

1019716489 is a deficient number, since it is larger than the sum of its proper divisors (101515140).

1019716489 is an frugal number, since it uses more digits than its factorization.

1019716489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828 (or 2914 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 46.

The cubic root of 1019716489 is about 1006.5294366658.

The spelling of 1019716489 in words is "one billion, nineteen million, seven hundred sixteen thousand, four hundred eighty-nine".