136914991 has 8 divisors (see below), whose sum is σ = 145106640. Its totient is φ = 128738688.

The previous prime is 136914989. The next prime is 136914997. The reversal of 136914991 is 199419631.

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

It is not a de Polignac number, because 136914991 - 2¹ = 136914989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136914997) 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, 18205 + ... + 24601.

It is an arithmetic number, because the mean of its divisors is an integer number (18138330).

Almost surely, 2^136914991 is an apocalyptic number.

136914991 is a deficient number, since it is larger than the sum of its proper divisors (8191649).

136914991 is a wasteful number, since it uses less digits than its factorization.

136914991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7673.

The product of its digits is 52488, while the sum is 43.

The square root of 136914991 is about 11701.0679427136. The cubic root of 136914991 is about 515.4070254474.

The spelling of 136914991 in words is "one hundred thirty-six million, nine hundred fourteen thousand, nine hundred ninety-one".