213654479 has 2 divisors, whose sum is σ = 213654480. Its totient is φ = 213654478.

The previous prime is 213654461. The next prime is 213654509. The reversal of 213654479 is 974456312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213654479 is a prime.

It is a super-2 number, since 2×213654479² = 91296472793522882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213854479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106827239 + 106827240.

It is an arithmetic number, because the mean of its divisors is an integer number (106827240).

Almost surely, 2^213654479 is an apocalyptic number.

213654479 is a deficient number, since it is larger than the sum of its proper divisors (1).

213654479 is an equidigital number, since it uses as much as digits as its factorization.

213654479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 213654479 is about 14616.9244028968. The cubic root of 213654479 is about 597.8203124889.

The spelling of 213654479 in words is "two hundred thirteen million, six hundred fifty-four thousand, four hundred seventy-nine".