249404453 has 2 divisors, whose sum is σ = 249404454. Its totient is φ = 249404452.

The previous prime is 249404381. The next prime is 249404471. The reversal of 249404453 is 354404942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249071524 + 332929 = 15782^2 + 577^2 .

It is a cyclic number.

It is not a de Polignac number, because 249404453 - 2¹² = 249400357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249404473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124702226 + 124702227.

It is an arithmetic number, because the mean of its divisors is an integer number (124702227).

Almost surely, 2^249404453 is an apocalyptic number.

It is an amenable number.

249404453 is a deficient number, since it is larger than the sum of its proper divisors (1).

249404453 is an equidigital number, since it uses as much as digits as its factorization.

249404453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 249404453 is about 15792.5442218789. The cubic root of 249404453 is about 629.4598990741.

The spelling of 249404453 in words is "two hundred forty-nine million, four hundred four thousand, four hundred fifty-three".