213607949497 has 2 divisors, whose sum is σ = 213607949498. Its totient is φ = 213607949496.

The previous prime is 213607949491. The next prime is 213607949501. The reversal of 213607949497 is 794949706312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189437339536 + 24170609961 = 435244^2 + 155469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213607949497 is a prime.

It is not a weakly prime, because it can be changed into another prime (213607949491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106803974748 + 106803974749.

It is an arithmetic number, because the mean of its divisors is an integer number (106803974749).

Almost surely, 2^213607949497 is an apocalyptic number.

It is an amenable number.

213607949497 is a deficient number, since it is larger than the sum of its proper divisors (1).

213607949497 is an equidigital number, since it uses as much as digits as its factorization.

213607949497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20575296, while the sum is 61.

The spelling of 213607949497 in words is "two hundred thirteen billion, six hundred seven million, nine hundred forty-nine thousand, four hundred ninety-seven".