889778297409 has 4 divisors (see below), whose sum is σ = 1186371063216. Its totient is φ = 593185531604.

The previous prime is 889778297393. The next prime is 889778297411. The reversal of 889778297409 is 904792877988.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 889778297409 - 2⁴ = 889778297393 is a prime.

It is a super-2 number, since 2×889778297409² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (889778297479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148296382899 + ... + 148296382904.

It is an arithmetic number, because the mean of its divisors is an integer number (296592765804).

Almost surely, 2^889778297409 is an apocalyptic number.

It is an amenable number.

889778297409 is a deficient number, since it is larger than the sum of its proper divisors (296592765807).

889778297409 is a wasteful number, since it uses less digits than its factorization.

889778297409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296592765806.

The product of its (nonzero) digits is 1024192512, while the sum is 78.

The spelling of 889778297409 in words is "eight hundred eighty-nine billion, seven hundred seventy-eight million, two hundred ninety-seven thousand, four hundred nine".