253089821 has 2 divisors, whose sum is σ = 253089822. Its totient is φ = 253089820.

The previous prime is 253089803. The next prime is 253089833. The reversal of 253089821 is 128980352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214476025 + 38613796 = 14645^2 + 6214^2 .

It is a cyclic number.

It is not a de Polignac number, because 253089821 - 2¹⁸ = 252827677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253089841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126544910 + 126544911.

It is an arithmetic number, because the mean of its divisors is an integer number (126544911).

Almost surely, 2^253089821 is an apocalyptic number.

It is an amenable number.

253089821 is a deficient number, since it is larger than the sum of its proper divisors (1).

253089821 is an equidigital number, since it uses as much as digits as its factorization.

253089821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 253089821 is about 15908.7969689729. The cubic root of 253089821 is about 632.5451928110.

The spelling of 253089821 in words is "two hundred fifty-three million, eighty-nine thousand, eight hundred twenty-one".