342991871 has 4 divisors (see below), whose sum is σ = 343125552. Its totient is φ = 342858192.

The previous prime is 342991861. The next prime is 342991877. The reversal of 342991871 is 178199243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178199243 = 41 ⋅4346323.

It is a cyclic number.

It is not a de Polignac number, because 342991871 - 2⁶ = 342991807 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 (342991877) 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, 62915 + ... + 68148.

It is an arithmetic number, because the mean of its divisors is an integer number (85781388).

Almost surely, 2^342991871 is an apocalyptic number.

342991871 is a deficient number, since it is larger than the sum of its proper divisors (133681).

342991871 is a wasteful number, since it uses less digits than its factorization.

342991871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133680.

The product of its digits is 108864, while the sum is 44.

The square root of 342991871 is about 18520.0397137803. The cubic root of 342991871 is about 699.9944700243.

The spelling of 342991871 in words is "three hundred forty-two million, nine hundred ninety-one thousand, eight hundred seventy-one".