191342129 has 8 divisors (see below), whose sum is σ = 217812672. Its totient is φ = 166384240.

The previous prime is 191342113. The next prime is 191342143. The reversal of 191342129 is 921243191.

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

It is not a de Polignac number, because 191342129 - 2⁴ = 191342113 is a prime.

It is a super-2 number, since 2×191342129² = 73223620660505282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 191342095 and 191342104.

It is not an unprimeable number, because it can be changed into a prime (191342329) 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, 377894 + ... + 378399.

It is an arithmetic number, because the mean of its divisors is an integer number (27226584).

Almost surely, 2^191342129 is an apocalyptic number.

It is an amenable number.

191342129 is a deficient number, since it is larger than the sum of its proper divisors (26470543).

191342129 is a wasteful number, since it uses less digits than its factorization.

191342129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756327.

The product of its digits is 3888, while the sum is 32.

The square root of 191342129 is about 13832.6472159164. The cubic root of 191342129 is about 576.2401754073.

The spelling of 191342129 in words is "one hundred ninety-one million, three hundred forty-two thousand, one hundred twenty-nine".