1850663491 has 2 divisors, whose sum is σ = 1850663492. Its totient is φ = 1850663490.

The previous prime is 1850663461. The next prime is 1850663497. The reversal of 1850663491 is 1943660581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1850663491 - 2⁷ = 1850663363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1850663497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925331745 + 925331746.

It is an arithmetic number, because the mean of its divisors is an integer number (925331746).

Almost surely, 2^1850663491 is an apocalyptic number.

1850663491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850663491 is an equidigital number, since it uses as much as digits as its factorization.

1850663491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1850663491 is about 43019.3385699966. The cubic root of 1850663491 is about 1227.7477658101.

The spelling of 1850663491 in words is "one billion, eight hundred fifty million, six hundred sixty-three thousand, four hundred ninety-one".