213934697 has 2 divisors, whose sum is σ = 213934698. Its totient is φ = 213934696.

The previous prime is 213934673. The next prime is 213934709. The reversal of 213934697 is 796439312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107101801 + 106832896 = 10349^2 + 10336^2 .

It is a cyclic number.

It is not a de Polignac number, because 213934697 - 2²² = 209740393 is a prime.

It is not a weakly prime, because it can be changed into another prime (213934657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106967348 + 106967349.

It is an arithmetic number, because the mean of its divisors is an integer number (106967349).

Almost surely, 2^213934697 is an apocalyptic number.

It is an amenable number.

213934697 is a deficient number, since it is larger than the sum of its proper divisors (1).

213934697 is an equidigital number, since it uses as much as digits as its factorization.

213934697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 44.

The square root of 213934697 is about 14626.5066574353. The cubic root of 213934697 is about 598.0815548924.

The spelling of 213934697 in words is "two hundred thirteen million, nine hundred thirty-four thousand, six hundred ninety-seven".