136950991 has 2 divisors, whose sum is σ = 136950992. Its totient is φ = 136950990.

The previous prime is 136950967. The next prime is 136951013. The reversal of 136950991 is 199059631.

136950991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (199059631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136950991 - 2¹¹ = 136948943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136950491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68475495 + 68475496.

It is an arithmetic number, because the mean of its divisors is an integer number (68475496).

Almost surely, 2^136950991 is an apocalyptic number.

136950991 is a deficient number, since it is larger than the sum of its proper divisors (1).

136950991 is an equidigital number, since it uses as much as digits as its factorization.

136950991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 43.

The square root of 136950991 is about 11702.6061627314. The cubic root of 136950991 is about 515.4521946598.

The spelling of 136950991 in words is "one hundred thirty-six million, nine hundred fifty thousand, nine hundred ninety-one".