211413997 has 2 divisors, whose sum is σ = 211413998. Its totient is φ = 211413996.

The previous prime is 211413977. The next prime is 211414001. The reversal of 211413997 is 799314112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185749641 + 25664356 = 13629^2 + 5066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211413997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211413947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105706998 + 105706999.

It is an arithmetic number, because the mean of its divisors is an integer number (105706999).

Almost surely, 2^211413997 is an apocalyptic number.

It is an amenable number.

211413997 is a deficient number, since it is larger than the sum of its proper divisors (1).

211413997 is an equidigital number, since it uses as much as digits as its factorization.

211413997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 211413997 is about 14540.0824275518. The cubic root of 211413997 is about 595.7232896007.

The spelling of 211413997 in words is "two hundred eleven million, four hundred thirteen thousand, nine hundred ninety-seven".