136894831 has 2 divisors, whose sum is σ = 136894832. Its totient is φ = 136894830.

The previous prime is 136894811. The next prime is 136894841. The reversal of 136894831 is 138498631.

136894831 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 (138498631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136894831 - 2⁵ = 136894799 is a prime.

It is a super-2 number, since 2×136894831² = 37480389509037122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136894801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68447415 + 68447416.

It is an arithmetic number, because the mean of its divisors is an integer number (68447416).

Almost surely, 2^136894831 is an apocalyptic number.

136894831 is a deficient number, since it is larger than the sum of its proper divisors (1).

136894831 is an equidigital number, since it uses as much as digits as its factorization.

136894831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 136894831 is about 11700.2064511700. The cubic root of 136894831 is about 515.3817272299.

The spelling of 136894831 in words is "one hundred thirty-six million, eight hundred ninety-four thousand, eight hundred thirty-one".