213894929 has 2 divisors, whose sum is σ = 213894930. Its totient is φ = 213894928.

The previous prime is 213894907. The next prime is 213894937. The reversal of 213894929 is 929498312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160604929 + 53290000 = 12673^2 + 7300^2 .

It is a cyclic number.

It is not a de Polignac number, because 213894929 - 2⁸ = 213894673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213854929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106947464 + 106947465.

It is an arithmetic number, because the mean of its divisors is an integer number (106947465).

Almost surely, 2^213894929 is an apocalyptic number.

It is an amenable number.

213894929 is a deficient number, since it is larger than the sum of its proper divisors (1).

213894929 is an equidigital number, since it uses as much as digits as its factorization.

213894929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 213894929 is about 14625.1471445589. The cubic root of 213894929 is about 598.0444937681.

The spelling of 213894929 in words is "two hundred thirteen million, eight hundred ninety-four thousand, nine hundred twenty-nine".