135967619 has 2 divisors, whose sum is σ = 135967620. Its totient is φ = 135967618.

The previous prime is 135967607. The next prime is 135967639. The reversal of 135967619 is 916769531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135967619 is a prime.

It is a super-2 number, since 2×135967619² = 36974386833058322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135967639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67983809 + 67983810.

It is an arithmetic number, because the mean of its divisors is an integer number (67983810).

Almost surely, 2^135967619 is an apocalyptic number.

135967619 is a deficient number, since it is larger than the sum of its proper divisors (1).

135967619 is an equidigital number, since it uses as much as digits as its factorization.

135967619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 47.

The square root of 135967619 is about 11660.5153831209. The cubic root of 135967619 is about 514.2155008385.

The spelling of 135967619 in words is "one hundred thirty-five million, nine hundred sixty-seven thousand, six hundred nineteen".