1930198549 has 4 divisors (see below), whose sum is σ = 1930372236. Its totient is φ = 1930024864.

The previous prime is 1930198537. The next prime is 1930198553. The reversal of 1930198549 is 9458910391.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 932080900 + 998117649 = 30530^2 + 31593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1930198549 - 2¹³ = 1930190357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1930198519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68944 + ... + 92809.

It is an arithmetic number, because the mean of its divisors is an integer number (482593059).

Almost surely, 2^1930198549 is an apocalyptic number.

It is an amenable number.

1930198549 is a deficient number, since it is larger than the sum of its proper divisors (173687).

1930198549 is a wasteful number, since it uses less digits than its factorization.

1930198549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173686.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 1930198549 is about 43934.0249578843. The cubic root of 1930198549 is about 1245.0897606827.

The spelling of 1930198549 in words is "one billion, nine hundred thirty million, one hundred ninety-eight thousand, five hundred forty-nine".