1930309291 has 2 divisors, whose sum is σ = 1930309292. Its totient is φ = 1930309290.

The previous prime is 1930309253. The next prime is 1930309307. The reversal of 1930309291 is 1929030391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1930309291 - 2¹³ = 1930301099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1930309291.

It is not a weakly prime, because it can be changed into another prime (1930309391) 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 as a sum of consecutive naturals, namely, 965154645 + 965154646.

It is an arithmetic number, because the mean of its divisors is an integer number (965154646).

Almost surely, 2^1930309291 is an apocalyptic number.

1930309291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1930309291 is an equidigital number, since it uses as much as digits as its factorization.

1930309291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 1930309291 is about 43935.2852613933. The cubic root of 1930309291 is about 1245.1135718934.

The spelling of 1930309291 in words is "one billion, nine hundred thirty million, three hundred nine thousand, two hundred ninety-one".