193949131 has 4 divisors (see below), whose sum is σ = 204157000. Its totient is φ = 183741264.

The previous prime is 193949123. The next prime is 193949137. The reversal of 193949131 is 131949391.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 193949131 - 2³ = 193949123 is a prime.

It is a super-2 number, since 2×193949131² = 75232530831310322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (193949137) 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, 5103906 + ... + 5103943.

It is an arithmetic number, because the mean of its divisors is an integer number (51039250).

Almost surely, 2^193949131 is an apocalyptic number.

193949131 is a deficient number, since it is larger than the sum of its proper divisors (10207869).

193949131 is a wasteful number, since it uses less digits than its factorization.

193949131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10207868.

The product of its digits is 26244, while the sum is 40.

The square root of 193949131 is about 13926.5620667845. The cubic root of 193949131 is about 578.8454350812.

The spelling of 193949131 in words is "one hundred ninety-three million, nine hundred forty-nine thousand, one hundred thirty-one".