253136437 has 2 divisors, whose sum is σ = 253136438. Its totient is φ = 253136436.

The previous prime is 253136431. The next prime is 253136441. The reversal of 253136437 is 734631352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232288081 + 20848356 = 15241^2 + 4566^2 .

It is a cyclic number.

It is not a de Polignac number, because 253136437 - 2⁷ = 253136309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253136431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126568218 + 126568219.

It is an arithmetic number, because the mean of its divisors is an integer number (126568219).

Almost surely, 2^253136437 is an apocalyptic number.

It is an amenable number.

253136437 is a deficient number, since it is larger than the sum of its proper divisors (1).

253136437 is an equidigital number, since it uses as much as digits as its factorization.

253136437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 34.

The square root of 253136437 is about 15910.2620028710. The cubic root of 253136437 is about 632.5840260816.

Adding to 253136437 its reverse (734631352), we get a palindrome (987767789).

The spelling of 253136437 in words is "two hundred fifty-three million, one hundred thirty-six thousand, four hundred thirty-seven".