135967491 has 24 divisors (see below), whose sum is σ = 222191424. Its totient is φ = 82402920.

The previous prime is 135967483. The next prime is 135967499. The reversal of 135967491 is 194769531.

135967491 is a `hidden beast` number, since 13 + 596 + 7 + 49 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (135967483) and next prime (135967499).

It is not a de Polignac number, because 135967491 - 2³ = 135967483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135967499) 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 in 23 ways as a sum of consecutive naturals, for example, 22761 + ... + 28106.

It is an arithmetic number, because the mean of its divisors is an integer number (9257976).

Almost surely, 2^135967491 is an apocalyptic number.

135967491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135967491 is a deficient number, since it is larger than the sum of its proper divisors (86223933).

135967491 is an equidigital number, since it uses as much as digits as its factorization.

135967491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50893 (or 50881 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 135967491 is about 11660.5098945115. The cubic root of 135967491 is about 514.2153394775.

The spelling of 135967491 in words is "one hundred thirty-five million, nine hundred sixty-seven thousand, four hundred ninety-one".