253705549 has 2 divisors, whose sum is σ = 253705550. Its totient is φ = 253705548.

The previous prime is 253705531. The next prime is 253705553. The reversal of 253705549 is 945507352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166152100 + 87553449 = 12890^2 + 9357^2 .

It is a cyclic number.

It is not a de Polignac number, because 253705549 - 2¹³ = 253697357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253705579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126852774 + 126852775.

It is an arithmetic number, because the mean of its divisors is an integer number (126852775).

Almost surely, 2^253705549 is an apocalyptic number.

It is an amenable number.

253705549 is a deficient number, since it is larger than the sum of its proper divisors (1).

253705549 is an equidigital number, since it uses as much as digits as its factorization.

253705549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 253705549 is about 15928.1370222635. The cubic root of 253705549 is about 633.0577386028.

The spelling of 253705549 in words is "two hundred fifty-three million, seven hundred five thousand, five hundred forty-nine".