136477261 has 2 divisors, whose sum is σ = 136477262. Its totient is φ = 136477260.

The previous prime is 136477217. The next prime is 136477291. The reversal of 136477261 is 162774631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105452361 + 31024900 = 10269^2 + 5570^2 .

It is a cyclic number.

It is not a de Polignac number, because 136477261 - 2²¹ = 134380109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136477261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136477291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68238630 + 68238631.

It is an arithmetic number, because the mean of its divisors is an integer number (68238631).

Almost surely, 2^136477261 is an apocalyptic number.

It is an amenable number.

136477261 is a deficient number, since it is larger than the sum of its proper divisors (1).

136477261 is an equidigital number, since it uses as much as digits as its factorization.

136477261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 136477261 is about 11682.3482656528. The cubic root of 136477261 is about 514.8571709362.

The spelling of 136477261 in words is "one hundred thirty-six million, four hundred seventy-seven thousand, two hundred sixty-one".