136409477 has 2 divisors, whose sum is σ = 136409478. Its totient is φ = 136409476.

The previous prime is 136409453. The next prime is 136409503. The reversal of 136409477 is 774904631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125126596 + 11282881 = 11186^2 + 3359^2 .

It is an emirp because it is prime and its reverse (774904631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136409477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136409447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68204738 + 68204739.

It is an arithmetic number, because the mean of its divisors is an integer number (68204739).

Almost surely, 2^136409477 is an apocalyptic number.

It is an amenable number.

136409477 is a deficient number, since it is larger than the sum of its proper divisors (1).

136409477 is an equidigital number, since it uses as much as digits as its factorization.

136409477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 136409477 is about 11679.4467762818. The cubic root of 136409477 is about 514.7719189864.

The spelling of 136409477 in words is "one hundred thirty-six million, four hundred nine thousand, four hundred seventy-seven".