889897509 has 80 divisors (see below), whose sum is σ = 1468262400. Its totient is φ = 534957696.

The previous prime is 889897469. The next prime is 889897517. The reversal of 889897509 is 905798988.

It is not a de Polignac number, because 889897509 - 2¹² = 889893413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889897559) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5668059 + ... + 5668215.

It is an arithmetic number, because the mean of its divisors is an integer number (18353280).

Almost surely, 2^889897509 is an apocalyptic number.

It is an amenable number.

889897509 is a deficient number, since it is larger than the sum of its proper divisors (578364891).

889897509 is a wasteful number, since it uses less digits than its factorization.

889897509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 63.

The square root of 889897509 is about 29831.1499778336. The cubic root of 889897509 is about 961.8632465534.

The spelling of 889897509 in words is "eight hundred eighty-nine million, eight hundred ninety-seven thousand, five hundred nine".