193136939 has 4 divisors (see below), whose sum is σ = 193171920. Its totient is φ = 193101960.

The previous prime is 193136917. The next prime is 193136941. The reversal of 193136939 is 939631391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939631391 = 37 ⋅25395443.

It is a cyclic number.

It is not a de Polignac number, because 193136939 - 2¹² = 193132843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 193136939.

It is not an unprimeable number, because it can be changed into a prime (193130939) 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, 7184 + ... + 20925.

It is an arithmetic number, because the mean of its divisors is an integer number (48292980).

Almost surely, 2^193136939 is an apocalyptic number.

193136939 is a deficient number, since it is larger than the sum of its proper divisors (34981).

193136939 is an equidigital number, since it uses as much as digits as its factorization.

193136939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34980.

The product of its digits is 118098, while the sum is 44.

The square root of 193136939 is about 13897.3716579791. The cubic root of 193136939 is about 578.0363029604.

The spelling of 193136939 in words is "one hundred ninety-three million, one hundred thirty-six thousand, nine hundred thirty-nine".