194397901 has 4 divisors (see below), whose sum is σ = 194432832. Its totient is φ = 194362972.

The previous prime is 194397893. The next prime is 194397923. The reversal of 194397901 is 109793491.

It is a happy number.

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: 109793491 = 43 ⋅2553337.

It is a cyclic number.

It is not a de Polignac number, because 194397901 - 2³ = 194397893 is a prime.

It is a super-5 number, since 5×194397901⁵ (a number of 43 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194397971) 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, 7045 + ... + 20938.

It is an arithmetic number, because the mean of its divisors is an integer number (48608208).

Almost surely, 2^194397901 is an apocalyptic number.

It is an amenable number.

194397901 is a deficient number, since it is larger than the sum of its proper divisors (34931).

194397901 is an equidigital number, since it uses as much as digits as its factorization.

194397901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34930.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 194397901 is about 13942.6647739950. The cubic root of 194397901 is about 579.2915458153.

The spelling of 194397901 in words is "one hundred ninety-four million, three hundred ninety-seven thousand, nine hundred one".