136940691 has 8 divisors (see below), whose sum is σ = 182672640. Its totient is φ = 91251272.

The previous prime is 136940653. The next prime is 136940693. The reversal of 136940691 is 196049631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136940691 - 2¹⁷ = 136809619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136940693) 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 7 ways as a sum of consecutive naturals, for example, 2151 + ... + 16688.

It is an arithmetic number, because the mean of its divisors is an integer number (22834080).

Almost surely, 2^136940691 is an apocalyptic number.

136940691 is a deficient number, since it is larger than the sum of its proper divisors (45731949).

136940691 is a wasteful number, since it uses less digits than its factorization.

136940691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21265.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 136940691 is about 11702.1660815423. The cubic root of 136940691 is about 515.4392720547.

The spelling of 136940691 in words is "one hundred thirty-six million, nine hundred forty thousand, six hundred ninety-one".