213446957 has 2 divisors, whose sum is σ = 213446958. Its totient is φ = 213446956.

The previous prime is 213446941. The next prime is 213446993. The reversal of 213446957 is 759644312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197852356 + 15594601 = 14066^2 + 3949^2 .

It is a cyclic number.

It is not a de Polignac number, because 213446957 - 2⁴ = 213446941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213446557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106723478 + 106723479.

It is an arithmetic number, because the mean of its divisors is an integer number (106723479).

Almost surely, 2^213446957 is an apocalyptic number.

It is an amenable number.

213446957 is a deficient number, since it is larger than the sum of its proper divisors (1).

213446957 is an equidigital number, since it uses as much as digits as its factorization.

213446957 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 213446957 is about 14609.8239893573. The cubic root of 213446957 is about 597.6266960545.

The spelling of 213446957 in words is "two hundred thirteen million, four hundred forty-six thousand, nine hundred fifty-seven".