135725749 has 2 divisors, whose sum is σ = 135725750. Its totient is φ = 135725748.

The previous prime is 135725747. The next prime is 135725767. The reversal of 135725749 is 947527531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135722500 + 3249 = 11650^2 + 57^2 .

It is a cyclic number.

It is not a de Polignac number, because 135725749 - 2¹ = 135725747 is a prime.

It is a super-2 number, since 2×135725749² = 36842957883222002, which contains 22 as substring.

Together with 135725747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135725747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67862874 + 67862875.

It is an arithmetic number, because the mean of its divisors is an integer number (67862875).

Almost surely, 2^135725749 is an apocalyptic number.

It is an amenable number.

135725749 is a deficient number, since it is larger than the sum of its proper divisors (1).

135725749 is an equidigital number, since it uses as much as digits as its factorization.

135725749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 43.

The square root of 135725749 is about 11650.1394412256. The cubic root of 135725749 is about 513.9104107358.

It can be divided in two parts, 13572 and 5749, that added together give a square (19321 = 139²).

The spelling of 135725749 in words is "one hundred thirty-five million, seven hundred twenty-five thousand, seven hundred forty-nine".