213636901 has 2 divisors, whose sum is σ = 213636902. Its totient is φ = 213636900.

The previous prime is 213636887. The next prime is 213636919. The reversal of 213636901 is 109636312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178222500 + 35414401 = 13350^2 + 5951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213636901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213636961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106818450 + 106818451.

It is an arithmetic number, because the mean of its divisors is an integer number (106818451).

Almost surely, 2^213636901 is an apocalyptic number.

It is an amenable number.

213636901 is a deficient number, since it is larger than the sum of its proper divisors (1).

213636901 is an equidigital number, since it uses as much as digits as its factorization.

213636901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 213636901 is about 14616.3231012454. The cubic root of 213636901 is about 597.8039172110.

The spelling of 213636901 in words is "two hundred thirteen million, six hundred thirty-six thousand, nine hundred one".