309488604489 has 15 divisors (see below), whose sum is σ = 462329962743. Its totient is φ = 206322398424.

The previous prime is 309488604413. The next prime is 309488604517. The reversal of 309488604489 is 984406884903.

The square root of 309488604489 is 556317.

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

309488604489 is a `hidden beast` number, since 3 + 0 + 94 + 8 + 8 + 60 + 4 + 489 = 666.

It can be written as a sum of positive squares in only one way, i.e., 247839687225 + 61648917264 = 497835^2 + 248292^2 .

It is not a de Polignac number, because 309488604489 - 2²⁵ = 309455050057 is a prime.

It is a super-2 number, since 2×309488604489² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (309483604489) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4975947 + ... + 5037759.

Almost surely, 2^309488604489 is an apocalyptic number.

309488604489 is the 556317-th square number.

309488604489 is the 278159-th centered octagonal number.

It is an amenable number.

309488604489 is a deficient number, since it is larger than the sum of its proper divisors (152841358254).

309488604489 is an frugal number, since it uses more digits than its factorization.

309488604489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123638 (or 61816 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 63.

The spelling of 309488604489 in words is "three hundred nine billion, four hundred eighty-eight million, six hundred four thousand, four hundred eighty-nine".