213449123 has 2 divisors, whose sum is σ = 213449124. Its totient is φ = 213449122.

The previous prime is 213449113. The next prime is 213449129. The reversal of 213449123 is 321944312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213449123 - 2⁴ = 213449107 is a prime.

It is not a weakly prime, because it can be changed into another prime (213449129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106724561 + 106724562.

It is an arithmetic number, because the mean of its divisors is an integer number (106724562).

Almost surely, 2^213449123 is an apocalyptic number.

213449123 is a deficient number, since it is larger than the sum of its proper divisors (1).

213449123 is an equidigital number, since it uses as much as digits as its factorization.

213449123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 213449123 is about 14609.8981173723. The cubic root of 213449123 is about 597.6287175639.

The spelling of 213449123 in words is "two hundred thirteen million, four hundred forty-nine thousand, one hundred twenty-three".