1972005113 has 4 divisors (see below), whose sum is σ = 2123697828. Its totient is φ = 1820312400.

The previous prime is 1972005109. The next prime is 1972005131. The reversal of 1972005113 is 3115002791.

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 352988944 + 1619016169 = 18788^2 + 40237^2 .

It is a cyclic number.

It is not a de Polignac number, because 1972005113 - 2² = 1972005109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1972005163) 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, 75846338 + ... + 75846363.

It is an arithmetic number, because the mean of its divisors is an integer number (530924457).

Almost surely, 2^1972005113 is an apocalyptic number.

1972005113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1972005113 is a deficient number, since it is larger than the sum of its proper divisors (151692715).

1972005113 is a wasteful number, since it uses less digits than its factorization.

1972005113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151692714.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 1972005113 is about 44407.2641917964. The cubic root of 1972005113 is about 1254.0148484277.

The spelling of 1972005113 in words is "one billion, nine hundred seventy-two million, five thousand, one hundred thirteen".