1897966499 has 12 divisors (see below), whose sum is σ = 2242032552. Its totient is φ = 1592697600.

The previous prime is 1897966481. The next prime is 1897966501. The reversal of 1897966499 is 9946697981.

It is not a de Polignac number, because 1897966499 - 2²⁰ = 1896917923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1897966409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508622 + ... + 512339.

It is an arithmetic number, because the mean of its divisors is an integer number (186836046).

Almost surely, 2^1897966499 is an apocalyptic number.

1897966499 is a deficient number, since it is larger than the sum of its proper divisors (344066053).

1897966499 is a wasteful number, since it uses less digits than its factorization.

1897966499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020998 (or 1020985 counting only the distinct ones).

The product of its digits is 52907904, while the sum is 68.

The square root of 1897966499 is about 43565.6573346484. The cubic root of 1897966499 is about 1238.1203091391.

The spelling of 1897966499 in words is "one billion, eight hundred ninety-seven million, nine hundred sixty-six thousand, four hundred ninety-nine".