1930873261 has 4 divisors (see below), whose sum is σ = 1931738652. Its totient is φ = 1930007872.

The previous prime is 1930873249. The next prime is 1930873267. The reversal of 1930873261 is 1623780391.

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 1608491236 + 322382025 = 40106^2 + 17955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1930873261 - 2¹⁷ = 1930742189 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1930873267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429340 + ... + 433813.

It is an arithmetic number, because the mean of its divisors is an integer number (482934663).

Almost surely, 2^1930873261 is an apocalyptic number.

It is an amenable number.

1930873261 is a deficient number, since it is larger than the sum of its proper divisors (865391).

1930873261 is an equidigital number, since it uses as much as digits as its factorization.

1930873261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865390.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1930873261 is about 43941.7029824744. The cubic root of 1930873261 is about 1245.2348198766.

The spelling of 1930873261 in words is "one billion, nine hundred thirty million, eight hundred seventy-three thousand, two hundred sixty-one".