135213761 has 2 divisors, whose sum is σ = 135213762. Its totient is φ = 135213760.

The previous prime is 135213679. The next prime is 135213769. The reversal of 135213761 is 167312531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87534736 + 47679025 = 9356^2 + 6905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135213761 is a prime.

It is a super-2 number, since 2×135213761² = 36565522327530242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135213769) 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, 67606880 + 67606881.

It is an arithmetic number, because the mean of its divisors is an integer number (67606881).

Almost surely, 2^135213761 is an apocalyptic number.

It is an amenable number.

135213761 is a deficient number, since it is larger than the sum of its proper divisors (1).

135213761 is an equidigital number, since it uses as much as digits as its factorization.

135213761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 29.

The square root of 135213761 is about 11628.1452089316. The cubic root of 135213761 is about 513.2634013448.

The spelling of 135213761 in words is "one hundred thirty-five million, two hundred thirteen thousand, seven hundred sixty-one".