213012973 has 2 divisors, whose sum is σ = 213012974. Its totient is φ = 213012972.

The previous prime is 213012967. The next prime is 213012991. The reversal of 213012973 is 379210312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159693769 + 53319204 = 12637^2 + 7302^2 .

It is a cyclic number.

It is not a de Polignac number, because 213012973 - 2⁹ = 213012461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213012073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106506486 + 106506487.

It is an arithmetic number, because the mean of its divisors is an integer number (106506487).

Almost surely, 2^213012973 is an apocalyptic number.

It is an amenable number.

213012973 is a deficient number, since it is larger than the sum of its proper divisors (1).

213012973 is an equidigital number, since it uses as much as digits as its factorization.

213012973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 213012973 is about 14594.9639602159. The cubic root of 213012973 is about 597.2213862995.

The spelling of 213012973 in words is "two hundred thirteen million, twelve thousand, nine hundred seventy-three".