194691469 has 4 divisors (see below), whose sum is σ = 222504544. Its totient is φ = 166878396.

The previous prime is 194691467. The next prime is 194691473. The reversal of 194691469 is 964196491.

194691469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 964196491 = 1289 ⋅748019.

It is a cyclic number.

It is not a de Polignac number, because 194691469 - 2¹ = 194691467 is a prime.

It is a super-2 number, since 2×194691469² = 75809536202755922, which contains 22 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 (194691467) 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, 13906527 + ... + 13906540.

It is an arithmetic number, because the mean of its divisors is an integer number (55626136).

Almost surely, 2^194691469 is an apocalyptic number.

It is an amenable number.

194691469 is a deficient number, since it is larger than the sum of its proper divisors (27813075).

194691469 is an equidigital number, since it uses as much as digits as its factorization.

194691469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27813074.

The product of its digits is 419904, while the sum is 49.

The square root of 194691469 is about 13953.1884886574. The cubic root of 194691469 is about 579.5830028833.

The spelling of 194691469 in words is "one hundred ninety-four million, six hundred ninety-one thousand, four hundred sixty-nine".