1897976769 has 16 divisors (see below), whose sum is σ = 2726203200. Its totient is φ = 1167598656.

The previous prime is 1897976711. The next prime is 1897976789. The reversal of 1897976769 is 9676797981.

It is not a de Polignac number, because 1897976769 - 2²⁸ = 1629541313 is a prime.

It is a super-2 number, since 2×1897976769² = 7204631631327358722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1897976789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150687 + ... + 162795.

It is an arithmetic number, because the mean of its divisors is an integer number (170387700).

Almost surely, 2^1897976769 is an apocalyptic number.

It is an amenable number.

1897976769 is a deficient number, since it is larger than the sum of its proper divisors (828226431).

1897976769 is a wasteful number, since it uses less digits than its factorization.

1897976769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16144.

The product of its digits is 72013536, while the sum is 69.

The square root of 1897976769 is about 43565.7752025601. The cubic root of 1897976769 is about 1238.1225423139.

The spelling of 1897976769 in words is "one billion, eight hundred ninety-seven million, nine hundred seventy-six thousand, seven hundred sixty-nine".