253536389 has 2 divisors, whose sum is σ = 253536390. Its totient is φ = 253536388.

The previous prime is 253536329. The next prime is 253536397. The reversal of 253536389 is 983635352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173791489 + 79744900 = 13183^2 + 8930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253536389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253536319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126768194 + 126768195.

It is an arithmetic number, because the mean of its divisors is an integer number (126768195).

Almost surely, 2^253536389 is an apocalyptic number.

It is an amenable number.

253536389 is a deficient number, since it is larger than the sum of its proper divisors (1).

253536389 is an equidigital number, since it uses as much as digits as its factorization.

253536389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 44.

The square root of 253536389 is about 15922.8260368566. The cubic root of 253536389 is about 632.9170087201.

The spelling of 253536389 in words is "two hundred fifty-three million, five hundred thirty-six thousand, three hundred eighty-nine".