194202989 has 4 divisors (see below), whose sum is σ = 194237760. Its totient is φ = 194168220.

The previous prime is 194202979. The next prime is 194202991. The reversal of 194202989 is 989202491.

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 194202989 - 2⁸ = 194202733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194202929) 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, 6899 + ... + 20880.

It is an arithmetic number, because the mean of its divisors is an integer number (48559440).

Almost surely, 2^194202989 is an apocalyptic number.

It is an amenable number.

194202989 is a deficient number, since it is larger than the sum of its proper divisors (34771).

194202989 is an equidigital number, since it uses as much as digits as its factorization.

194202989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34770.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 194202989 is about 13935.6732524841. The cubic root of 194202989 is about 579.0978732315.

The spelling of 194202989 in words is "one hundred ninety-four million, two hundred two thousand, nine hundred eighty-nine".