194426837 has 4 divisors (see below), whose sum is σ = 212102016. Its totient is φ = 176751660.

The previous prime is 194426833. The next prime is 194426839. The reversal of 194426837 is 738624491.

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: 738624491 = 11 ⋅67147681.

It is a cyclic number.

It is not a de Polignac number, because 194426837 - 2² = 194426833 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 (194426833) 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, 8837573 + ... + 8837594.

It is an arithmetic number, because the mean of its divisors is an integer number (53025504).

Almost surely, 2^194426837 is an apocalyptic number.

It is an amenable number.

194426837 is a deficient number, since it is larger than the sum of its proper divisors (17675179).

194426837 is a wasteful number, since it uses less digits than its factorization.

194426837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17675178.

The product of its digits is 290304, while the sum is 44.

The square root of 194426837 is about 13943.7024136346. The cubic root of 194426837 is about 579.3202867782.

The spelling of 194426837 in words is "one hundred ninety-four million, four hundred twenty-six thousand, eight hundred thirty-seven".