291139342 has 24 divisors (see below), whose sum is σ = 475442784. Its totient is φ = 133645824.

The previous prime is 291139309. The next prime is 291139367. The reversal of 291139342 is 243931192.

It is a junction number, because it is equal to n+sod(n) for n = 291139298 and 291139307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63003 + ... + 67465.

It is an arithmetic number, because the mean of its divisors is an integer number (19810116).

Almost surely, 2^291139342 is an apocalyptic number.

291139342 is a deficient number, since it is larger than the sum of its proper divisors (184303442).

291139342 is a wasteful number, since it uses less digits than its factorization.

291139342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4684 (or 4671 counting only the distinct ones).

The product of its digits is 11664, while the sum is 34.

The square root of 291139342 is about 17062.8058067834. The cubic root of 291139342 is about 662.7762925894.

The spelling of 291139342 in words is "two hundred ninety-one million, one hundred thirty-nine thousand, three hundred forty-two".