136881967 has 4 divisors (see below), whose sum is σ = 138237336. Its totient is φ = 135526600.

The previous prime is 136881959. The next prime is 136881971. The reversal of 136881967 is 769188631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136881967 - 2³ = 136881959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136881967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136881917) 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 in 3 ways as a sum of consecutive naturals, for example, 677533 + ... + 677734.

It is an arithmetic number, because the mean of its divisors is an integer number (34559334).

Almost surely, 2^136881967 is an apocalyptic number.

136881967 is a deficient number, since it is larger than the sum of its proper divisors (1355369).

136881967 is a wasteful number, since it uses less digits than its factorization.

136881967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355368.

The product of its digits is 435456, while the sum is 49.

The square root of 136881967 is about 11699.6567043653. The cubic root of 136881967 is about 515.3655832597.

The spelling of 136881967 in words is "one hundred thirty-six million, eight hundred eighty-one thousand, nine hundred sixty-seven".