340371021 has 4 divisors (see below), whose sum is σ = 453828032. Its totient is φ = 226914012.

The previous prime is 340371007. The next prime is 340371037. The reversal of 340371021 is 120173043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 340371021 - 2⁹ = 340370509 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 (340371061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56728501 + ... + 56728506.

It is an arithmetic number, because the mean of its divisors is an integer number (113457008).

Almost surely, 2^340371021 is an apocalyptic number.

It is an amenable number.

340371021 is a deficient number, since it is larger than the sum of its proper divisors (113457011).

340371021 is a wasteful number, since it uses less digits than its factorization.

340371021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113457010.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 340371021 is about 18449.1468908457. The cubic root of 340371021 is about 698.2069901409.

The spelling of 340371021 in words is "three hundred forty million, three hundred seventy-one thousand, twenty-one".