340421979 has 8 divisors (see below), whose sum is σ = 454116352. Its totient is φ = 226837800.

The previous prime is 340421959. The next prime is 340421999. The reversal of 340421979 is 979124043.

It is an interprime number because it is at equal distance from previous prime (340421959) and next prime (340421999).

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

It is not a de Polignac number, because 340421979 - 2⁹ = 340421467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340421959) 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, 20047 + ... + 32904.

It is an arithmetic number, because the mean of its divisors is an integer number (56764544).

Almost surely, 2^340421979 is an apocalyptic number.

340421979 is a deficient number, since it is larger than the sum of its proper divisors (113694373).

340421979 is a wasteful number, since it uses less digits than its factorization.

340421979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55097.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 340421979 is about 18450.5278786272. The cubic root of 340421979 is about 698.2418319794.

The spelling of 340421979 in words is "three hundred forty million, four hundred twenty-one thousand, nine hundred seventy-nine".