342061891 has 4 divisors (see below), whose sum is σ = 343324384. Its totient is φ = 340799400.

The previous prime is 342061877. The next prime is 342061901. The reversal of 342061891 is 198160243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198160243 = 263 ⋅753461.

It is a cyclic number.

It is not a de Polignac number, because 342061891 - 2¹⁷ = 341930819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (342061801) 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, 630840 + ... + 631381.

It is an arithmetic number, because the mean of its divisors is an integer number (85831096).

Almost surely, 2^342061891 is an apocalyptic number.

342061891 is a deficient number, since it is larger than the sum of its proper divisors (1262493).

342061891 is a wasteful number, since it uses less digits than its factorization.

342061891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262492.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 342061891 is about 18494.9152742044. The cubic root of 342061891 is about 699.3612479264.

The spelling of 342061891 in words is "three hundred forty-two million, sixty-one thousand, eight hundred ninety-one".