1930311305 has 16 divisors (see below), whose sum is σ = 2495707200. Its totient is φ = 1424803008.

The previous prime is 1930311301. The next prime is 1930311307. The reversal of 1930311305 is 5031130391.

It is a cyclic number.

It is not a de Polignac number, because 1930311305 - 2² = 1930311301 is a prime.

It is a super-2 number, since 2×1930311305² = 7452203468421606050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1930311301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169934 + ... + 180936.

It is an arithmetic number, because the mean of its divisors is an integer number (155981700).

Almost surely, 2^1930311305 is an apocalyptic number.

It is an amenable number.

1930311305 is a deficient number, since it is larger than the sum of its proper divisors (565395895).

1930311305 is a wasteful number, since it uses less digits than its factorization.

1930311305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13720.

The product of its (nonzero) digits is 1215, while the sum is 26.

The square root of 1930311305 is about 43935.3081814615. The cubic root of 1930311305 is about 1245.1140049256.

Adding to 1930311305 its reverse (5031130391), we get a palindrome (6961441696).

The spelling of 1930311305 in words is "one billion, nine hundred thirty million, three hundred eleven thousand, three hundred five".