135947719 has 2 divisors, whose sum is σ = 135947720. Its totient is φ = 135947718.

The previous prime is 135947689. The next prime is 135947723. The reversal of 135947719 is 917749531.

It is a strong prime.

It is an emirp because it is prime and its reverse (917749531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135947719 - 2¹³ = 135939527 is a prime.

It is a super-2 number, since 2×135947719² = 36963564602605922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135947729) 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, 67973859 + 67973860.

It is an arithmetic number, because the mean of its divisors is an integer number (67973860).

Almost surely, 2^135947719 is an apocalyptic number.

135947719 is a deficient number, since it is larger than the sum of its proper divisors (1).

135947719 is an equidigital number, since it uses as much as digits as its factorization.

135947719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 46.

The square root of 135947719 is about 11659.6620448450. The cubic root of 135947719 is about 514.1904130325.

The spelling of 135947719 in words is "one hundred thirty-five million, nine hundred forty-seven thousand, seven hundred nineteen".