210923436349 has 2 divisors, whose sum is σ = 210923436350. Its totient is φ = 210923436348.

The previous prime is 210923436331. The next prime is 210923436391. The reversal of 210923436349 is 943634329012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149059310724 + 61864125625 = 386082^2 + 248725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210923436349 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 210923436299 and 210923436308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210923136349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105461718174 + 105461718175.

It is an arithmetic number, because the mean of its divisors is an integer number (105461718175).

Almost surely, 2^210923436349 is an apocalyptic number.

It is an amenable number.

210923436349 is a deficient number, since it is larger than the sum of its proper divisors (1).

210923436349 is an equidigital number, since it uses as much as digits as its factorization.

210923436349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 46.

The spelling of 210923436349 in words is "two hundred ten billion, nine hundred twenty-three million, four hundred thirty-six thousand, three hundred forty-nine".