340023991 has 8 divisors (see below), whose sum is σ = 353813184. Its totient is φ = 326508000.

The previous prime is 340023989. The next prime is 340024001. The reversal of 340023991 is 199320043.

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

It is a cyclic number.

It is not a de Polignac number, because 340023991 - 2¹ = 340023989 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 (340023941) 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, 65760 + ... + 70741.

It is an arithmetic number, because the mean of its divisors is an integer number (44226648).

Almost surely, 2^340023991 is an apocalyptic number.

340023991 is a deficient number, since it is larger than the sum of its proper divisors (13789193).

340023991 is a wasteful number, since it uses less digits than its factorization.

340023991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136601.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 340023991 is about 18439.7394504369. The cubic root of 340023991 is about 697.9696205747.

The spelling of 340023991 in words is "three hundred forty million, twenty-three thousand, nine hundred ninety-one".