194989677 has 16 divisors (see below), whose sum is σ = 275596992. Its totient is φ = 122205440.

The previous prime is 194989673. The next prime is 194989679. The reversal of 194989677 is 776989491.

It is a cyclic number.

It is not a de Polignac number, because 194989677 - 2² = 194989673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194989677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194989673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58927 + ... + 62147.

It is an arithmetic number, because the mean of its divisors is an integer number (17224812).

Almost surely, 2^194989677 is an apocalyptic number.

194989677 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

194989677 is a deficient number, since it is larger than the sum of its proper divisors (80607315).

194989677 is a wasteful number, since it uses less digits than its factorization.

194989677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428.

The product of its digits is 6858432, while the sum is 60.

The square root of 194989677 is about 13963.8704161848. The cubic root of 194989677 is about 579.8787667738.

The spelling of 194989677 in words is "one hundred ninety-four million, nine hundred eighty-nine thousand, six hundred seventy-seven".