1897945037 has 2 divisors, whose sum is σ = 1897945038. Its totient is φ = 1897945036.

The previous prime is 1897945013. The next prime is 1897945039. The reversal of 1897945037 is 7305497981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1884775396 + 13169641 = 43414^2 + 3629^2 .

It is a cyclic number.

It is not a de Polignac number, because 1897945037 - 2²⁶ = 1830836173 is a prime.

Together with 1897945039, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1897945037.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1897945039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948972518 + 948972519.

It is an arithmetic number, because the mean of its divisors is an integer number (948972519).

Almost surely, 2^1897945037 is an apocalyptic number.

It is an amenable number.

1897945037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1897945037 is an equidigital number, since it uses as much as digits as its factorization.

1897945037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 1897945037 is about 43565.4110160802. The cubic root of 1897945037 is about 1238.1156422780.

The spelling of 1897945037 in words is "one billion, eight hundred ninety-seven million, nine hundred forty-five thousand, thirty-seven".