206431453 has 2 divisors, whose sum is σ = 206431454. Its totient is φ = 206431452.

The previous prime is 206431429. The next prime is 206431457. The reversal of 206431453 is 354134602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204004089 + 2427364 = 14283^2 + 1558^2 .

It is a cyclic number.

It is not a de Polignac number, because 206431453 - 2²¹ = 204334301 is a prime.

It is a super-2 number, since 2×206431453² = 85227889575382418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206431457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103215726 + 103215727.

It is an arithmetic number, because the mean of its divisors is an integer number (103215727).

Almost surely, 2^206431453 is an apocalyptic number.

It is an amenable number.

206431453 is a deficient number, since it is larger than the sum of its proper divisors (1).

206431453 is an equidigital number, since it uses as much as digits as its factorization.

206431453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 206431453 is about 14367.7226100729. The cubic root of 206431453 is about 591.0060905443.

The spelling of 206431453 in words is "two hundred six million, four hundred thirty-one thousand, four hundred fifty-three".