136409427 has 40 divisors (see below), whose sum is σ = 254065152. Its totient is φ = 70858800.

The previous prime is 136409423. The next prime is 136409431. The reversal of 136409427 is 724904631.

136409427 is a `hidden beast` number, since 1 + 3 + 640 + 9 + 4 + 2 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (136409423) and next prime (136409431).

It is not a de Polignac number, because 136409427 - 2² = 136409423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136409391 and 136409400.

It is not an unprimeable number, because it can be changed into a prime (136409423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4699 + ... + 17172.

Almost surely, 2^136409427 is an apocalyptic number.

136409427 is a deficient number, since it is larger than the sum of its proper divisors (117655725).

136409427 is a wasteful number, since it uses less digits than its factorization.

136409427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21901 (or 21892 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 136409427 is about 11679.4446357693. Note that the first 3 decimals coincide. The cubic root of 136409427 is about 514.7718560910.

The spelling of 136409427 in words is "one hundred thirty-six million, four hundred nine thousand, four hundred twenty-seven".