1830898521 has 27 divisors (see below), whose sum is σ = 2812701151. Its totient is φ = 1147429824.

The previous prime is 1830898483. The next prime is 1830898523. The reversal of 1830898521 is 1258980381.

It is a happy number.

The square root of 1830898521 is 42789.

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

1830898521 is a `hidden beast` number, since 1 + 8 + 30 + 8 + 98 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1425440025 + 405458496 = 37755^2 + 20136^2 .

It is not a de Polignac number, because 1830898521 - 2¹³ = 1830890329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1830898523) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2181820 + ... + 2182658.

Almost surely, 2^1830898521 is an apocalyptic number.

1830898521 is the 42789-th square number.

1830898521 is the 21395-th centered octagonal number.

It is an amenable number.

1830898521 is a deficient number, since it is larger than the sum of its proper divisors (981802630).

1830898521 is an frugal number, since it uses more digits than its factorization.

1830898521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The cubic root of 1830898521 is about 1223.3613566495.

The spelling of 1830898521 in words is "one billion, eight hundred thirty million, eight hundred ninety-eight thousand, five hundred twenty-one".