1873197913 has 2 divisors, whose sum is σ = 1873197914. Its totient is φ = 1873197912.

The previous prime is 1873197889. The next prime is 1873197959. The reversal of 1873197913 is 3197913781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1497148249 + 376049664 = 38693^2 + 19392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1873197913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1873197713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936598956 + 936598957.

It is an arithmetic number, because the mean of its divisors is an integer number (936598957).

Almost surely, 2^1873197913 is an apocalyptic number.

It is an amenable number.

1873197913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1873197913 is an equidigital number, since it uses as much as digits as its factorization.

1873197913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 49.

The square root of 1873197913 is about 43280.4564786463. The cubic root of 1873197913 is about 1232.7108590929.

The spelling of 1873197913 in words is "one billion, eight hundred seventy-three million, one hundred ninety-seven thousand, nine hundred thirteen".