1491102489 has 16 divisors (see below), whose sum is σ = 2075472000. Its totient is φ = 950438016.

The previous prime is 1491102421. The next prime is 1491102499. The reversal of 1491102489 is 9842011941.

It is not a de Polignac number, because 1491102489 - 2²¹ = 1489005337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1491102499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297597 + ... + 302565.

It is an arithmetic number, because the mean of its divisors is an integer number (129717000).

Almost surely, 2^1491102489 is an apocalyptic number.

It is an amenable number.

1491102489 is a deficient number, since it is larger than the sum of its proper divisors (584369511).

1491102489 is a wasteful number, since it uses less digits than its factorization.

1491102489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9344.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1491102489 is about 38614.7962444450. The cubic root of 1491102489 is about 1142.4463953450.

The spelling of 1491102489 in words is "one billion, four hundred ninety-one million, one hundred two thousand, four hundred eighty-nine".