194042997 has 6 divisors (see below), whose sum is σ = 280284342. Its totient is φ = 129361992.

The previous prime is 194042993. The next prime is 194043007. The reversal of 194042997 is 799240491.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 193515921 + 527076 = 13911^2 + 726^2 .

It is not a de Polignac number, because 194042997 - 2² = 194042993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194042993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10780158 + ... + 10780175.

It is an arithmetic number, because the mean of its divisors is an integer number (46714057).

Almost surely, 2^194042997 is an apocalyptic number.

It is an amenable number.

194042997 is a deficient number, since it is larger than the sum of its proper divisors (86241345).

194042997 is a wasteful number, since it uses less digits than its factorization.

194042997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21560339 (or 21560336 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 194042997 is about 13929.9316940177. The cubic root of 194042997 is about 578.9388017325.

The spelling of 194042997 in words is "one hundred ninety-four million, forty-two thousand, nine hundred ninety-seven".