193889429 has 4 divisors (see below), whose sum is σ = 198014784. Its totient is φ = 189764076.

The previous prime is 193889419. The next prime is 193889441. The reversal of 193889429 is 924988391.

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: 924988391 = 3019 ⋅306389.

It is a cyclic number.

It is not a de Polignac number, because 193889429 - 2¹² = 193885333 is a prime.

It is a super-2 number, since 2×193889429² = 75186221355892082, 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 (193889419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2062607 + ... + 2062700.

It is an arithmetic number, because the mean of its divisors is an integer number (49503696).

Almost surely, 2^193889429 is an apocalyptic number.

It is an amenable number.

193889429 is a deficient number, since it is larger than the sum of its proper divisors (4125355).

193889429 is an equidigital number, since it uses as much as digits as its factorization.

193889429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125354.

The product of its digits is 1119744, while the sum is 53.

The square root of 193889429 is about 13924.4184438705. The cubic root of 193889429 is about 578.7860350098.

The spelling of 193889429 in words is "one hundred ninety-three million, eight hundred eighty-nine thousand, four hundred twenty-nine".