213643039 has 2 divisors, whose sum is σ = 213643040. Its totient is φ = 213643038.

The previous prime is 213643009. The next prime is 213643043. The reversal of 213643039 is 930346312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213643039 - 2⁵ = 213643007 is a prime.

It is a super-2 number, since 2×213643039² = 91286696226311042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213643039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213643009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106821519 + 106821520.

It is an arithmetic number, because the mean of its divisors is an integer number (106821520).

Almost surely, 2^213643039 is an apocalyptic number.

213643039 is a deficient number, since it is larger than the sum of its proper divisors (1).

213643039 is an equidigital number, since it uses as much as digits as its factorization.

213643039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 213643039 is about 14616.5330704651. The cubic root of 213643039 is about 597.8096423226.

The spelling of 213643039 in words is "two hundred thirteen million, six hundred forty-three thousand, thirty-nine".