1489755897 has 24 divisors (see below), whose sum is σ = 2544085440. Its totient is φ = 821933280.

The previous prime is 1489755833. The next prime is 1489755899. The reversal of 1489755897 is 7985579841.

1489755897 is a `hidden beast` number, since 1 + 48 + 9 + 7 + 5 + 589 + 7 = 666.

It is not a de Polignac number, because 1489755897 - 2⁶ = 1489755833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1489755899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 405879 + ... + 409532.

It is an arithmetic number, because the mean of its divisors is an integer number (106003560).

Almost surely, 2^1489755897 is an apocalyptic number.

It is an amenable number.

1489755897 is a deficient number, since it is larger than the sum of its proper divisors (1054329543).

1489755897 is a wasteful number, since it uses less digits than its factorization.

1489755897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815453 (or 815450 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 63.

The square root of 1489755897 is about 38597.3560882089. The cubic root of 1489755897 is about 1142.1023831069.

The spelling of 1489755897 in words is "one billion, four hundred eighty-nine million, seven hundred fifty-five thousand, eight hundred ninety-seven".