340653213 has 6 divisors (see below), whose sum is σ = 492054654. Its totient is φ = 227102136.

The previous prime is 340653199. The next prime is 340653221. The reversal of 340653213 is 312356043.

It is a happy number.

340653213 is a `hidden beast` number, since 3 + 4 + 0 + 653 + 2 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 314459289 + 26193924 = 17733^2 + 5118^2 .

It is not a de Polignac number, because 340653213 - 2⁶ = 340653149 is a prime.

It is a super-2 number, since 2×340653213² = 232089223054446738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340653263) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18925170 + ... + 18925187.

It is an arithmetic number, because the mean of its divisors is an integer number (82009109).

Almost surely, 2^340653213 is an apocalyptic number.

It is an amenable number.

340653213 is a deficient number, since it is larger than the sum of its proper divisors (151401441).

340653213 is a wasteful number, since it uses less digits than its factorization.

340653213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37850363 (or 37850360 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 340653213 is about 18456.7931396546. The cubic root of 340653213 is about 698.3998914062.

The spelling of 340653213 in words is "three hundred forty million, six hundred fifty-three thousand, two hundred thirteen".