1872500197 has 2 divisors, whose sum is σ = 1872500198. Its totient is φ = 1872500196.

The previous prime is 1872500191. The next prime is 1872500213. The reversal of 1872500197 is 7910052781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1333053121 + 539447076 = 36511^2 + 23226^2 .

It is a cyclic number.

It is not a de Polignac number, because 1872500197 - 2²³ = 1864111589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1872500191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936250098 + 936250099.

It is an arithmetic number, because the mean of its divisors is an integer number (936250099).

Almost surely, 2^1872500197 is an apocalyptic number.

It is an amenable number.

1872500197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1872500197 is an equidigital number, since it uses as much as digits as its factorization.

1872500197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 1872500197 is about 43272.3953231156. The cubic root of 1872500197 is about 1232.5577895051.

The spelling of 1872500197 in words is "one billion, eight hundred seventy-two million, five hundred thousand, one hundred ninety-seven".