136487449 has 4 divisors (see below), whose sum is σ = 155985664. Its totient is φ = 116989236.

The previous prime is 136487447. The next prime is 136487471. The reversal of 136487449 is 944784631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 136487449 - 2¹ = 136487447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136487399 and 136487408.

It is not an unprimeable number, because it can be changed into a prime (136487447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9749097 + ... + 9749110.

It is an arithmetic number, because the mean of its divisors is an integer number (38996416).

Almost surely, 2^136487449 is an apocalyptic number.

It is an amenable number.

136487449 is a deficient number, since it is larger than the sum of its proper divisors (19498215).

136487449 is an equidigital number, since it uses as much as digits as its factorization.

136487449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19498214.

The product of its digits is 580608, while the sum is 46.

The square root of 136487449 is about 11682.7842999860. The cubic root of 136487449 is about 514.8699819454.

The spelling of 136487449 in words is "one hundred thirty-six million, four hundred eighty-seven thousand, four hundred forty-nine".