193137989 has 8 divisors (see below), whose sum is σ = 214672032. Its totient is φ = 172266640.

The previous prime is 193137937. The next prime is 193137991. The reversal of 193137989 is 989731391.

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 193137989 - 2¹² = 193133893 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 (193137389) 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, 165059 + ... + 166224.

It is an arithmetic number, because the mean of its divisors is an integer number (26834004).

Almost surely, 2^193137989 is an apocalyptic number.

It is an amenable number.

193137989 is a deficient number, since it is larger than the sum of its proper divisors (21534043).

193137989 is a wasteful number, since it uses less digits than its factorization.

193137989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331347.

The product of its digits is 367416, while the sum is 50.

The square root of 193137989 is about 13897.4094348551. The cubic root of 193137989 is about 578.0373504677.

The spelling of 193137989 in words is "one hundred ninety-three million, one hundred thirty-seven thousand, nine hundred eighty-nine".