136828477 has 2 divisors, whose sum is σ = 136828478. Its totient is φ = 136828476.

The previous prime is 136828459. The next prime is 136828487. The reversal of 136828477 is 774828631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136679481 + 148996 = 11691^2 + 386^2 .

It is an emirp because it is prime and its reverse (774828631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136828477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136828487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68414238 + 68414239.

It is an arithmetic number, because the mean of its divisors is an integer number (68414239).

Almost surely, 2^136828477 is an apocalyptic number.

It is an amenable number.

136828477 is a deficient number, since it is larger than the sum of its proper divisors (1).

136828477 is an equidigital number, since it uses as much as digits as its factorization.

136828477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 46.

The square root of 136828477 is about 11697.3705164879. The cubic root of 136828477 is about 515.2984439151.

The spelling of 136828477 in words is "one hundred thirty-six million, eight hundred twenty-eight thousand, four hundred seventy-seven".