193142989 has 8 divisors (see below), whose sum is σ = 214710272. Its totient is φ = 172534320.

The previous prime is 193142941. The next prime is 193142993. The reversal of 193142989 is 989241391.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 193142989 - 2¹⁵ = 193110221 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 (193145989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239229 + ... + 240034.

It is an arithmetic number, because the mean of its divisors is an integer number (26838784).

Almost surely, 2^193142989 is an apocalyptic number.

It is an amenable number.

193142989 is a deficient number, since it is larger than the sum of its proper divisors (21567283).

193142989 is a wasteful number, since it uses less digits than its factorization.

193142989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479307.

The product of its digits is 139968, while the sum is 46.

The square root of 193142989 is about 13897.5893233323. The cubic root of 193142989 is about 578.0423385452.

The spelling of 193142989 in words is "one hundred ninety-three million, one hundred forty-two thousand, nine hundred eighty-nine".