136854889 has 2 divisors, whose sum is σ = 136854890. Its totient is φ = 136854888.

The previous prime is 136854881. The next prime is 136854901. The reversal of 136854889 is 988458631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125260864 + 11594025 = 11192^2 + 3405^2 .

It is an emirp because it is prime and its reverse (988458631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136854889 - 2³ = 136854881 is a prime.

It is not a weakly prime, because it can be changed into another prime (136854881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68427444 + 68427445.

It is an arithmetic number, because the mean of its divisors is an integer number (68427445).

Almost surely, 2^136854889 is an apocalyptic number.

It is an amenable number.

136854889 is a deficient number, since it is larger than the sum of its proper divisors (1).

136854889 is an equidigital number, since it uses as much as digits as its factorization.

136854889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 52.

The square root of 136854889 is about 11698.4994336881. The cubic root of 136854889 is about 515.3315978004.

The spelling of 136854889 in words is "one hundred thirty-six million, eight hundred fifty-four thousand, eight hundred eighty-nine".