1931164513 has 4 divisors (see below), whose sum is σ = 1936635588. Its totient is φ = 1925693440.

The previous prime is 1931164511. The next prime is 1931164531. The reversal of 1931164513 is 3154611391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3154611391 = 23 ⋅137157017.

It can be written as a sum of positive squares in 2 ways, for example, as 1490500449 + 440664064 = 38607^2 + 20992^2 .

It is a cyclic number.

It is not a de Polignac number, because 1931164513 - 2¹ = 1931164511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1931164511) 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, 2735008 + ... + 2735713.

It is an arithmetic number, because the mean of its divisors is an integer number (484158897).

Almost surely, 2^1931164513 is an apocalyptic number.

It is an amenable number.

1931164513 is a deficient number, since it is larger than the sum of its proper divisors (5471075).

1931164513 is an equidigital number, since it uses as much as digits as its factorization.

1931164513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5471074.

The product of its digits is 9720, while the sum is 34.

The square root of 1931164513 is about 43945.0169302505. The cubic root of 1931164513 is about 1245.2974269372.

The spelling of 1931164513 in words is "one billion, nine hundred thirty-one million, one hundred sixty-four thousand, five hundred thirteen".