136562381 has 2 divisors, whose sum is σ = 136562382. Its totient is φ = 136562380.

The previous prime is 136562369. The next prime is 136562383. The reversal of 136562381 is 183265631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119006281 + 17556100 = 10909^2 + 4190^2 .

It is an emirp because it is prime and its reverse (183265631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136562381 - 2²² = 132368077 is a prime.

It is a super-2 number, since 2×136562381² = 37298567808778322, which contains 22 as substring.

Together with 136562383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136562383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68281190 + 68281191.

It is an arithmetic number, because the mean of its divisors is an integer number (68281191).

Almost surely, 2^136562381 is an apocalyptic number.

It is an amenable number.

136562381 is a deficient number, since it is larger than the sum of its proper divisors (1).

136562381 is an equidigital number, since it uses as much as digits as its factorization.

136562381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 136562381 is about 11685.9908009548. The cubic root of 136562381 is about 514.9641864058.

The spelling of 136562381 in words is "one hundred thirty-six million, five hundred sixty-two thousand, three hundred eighty-one".