189877368697 has 4 divisors (see below), whose sum is σ = 191720838400. Its totient is φ = 188033898996.

The previous prime is 189877368673. The next prime is 189877368719. The reversal of 189877368697 is 796863778981.

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, and also an emirpimes, since its reverse is a distinct semiprime: 796863778981 = 10357 ⋅76939633.

It is a cyclic number.

It is not a de Polignac number, because 189877368697 - 2³⁵ = 155517630329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189877768697) 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, 921734697 + ... + 921734902.

It is an arithmetic number, because the mean of its divisors is an integer number (47930209600).

Almost surely, 2^189877368697 is an apocalyptic number.

It is an amenable number.

189877368697 is a deficient number, since it is larger than the sum of its proper divisors (1843469703).

189877368697 is a wasteful number, since it uses less digits than its factorization.

189877368697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843469702.

The product of its digits is 1536288768, while the sum is 79.

The spelling of 189877368697 in words is "one hundred eighty-nine billion, eight hundred seventy-seven million, three hundred sixty-eight thousand, six hundred ninety-seven".