136449819 has 16 divisors (see below), whose sum is σ = 220525440. Its totient is φ = 82696680.

The previous prime is 136449809. The next prime is 136449829. The reversal of 136449819 is 918944631.

It is an interprime number because it is at equal distance from previous prime (136449809) and next prime (136449829).

It is not a de Polignac number, because 136449819 - 2⁵ = 136449787 is a prime.

It is a super-2 number, since 2×136449819² = 37237106210265522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136449809) 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 15 ways as a sum of consecutive naturals, for example, 229417 + ... + 230010.

It is an arithmetic number, because the mean of its divisors is an integer number (13782840).

Almost surely, 2^136449819 is an apocalyptic number.

136449819 is a deficient number, since it is larger than the sum of its proper divisors (84075621).

136449819 is a wasteful number, since it uses less digits than its factorization.

136449819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459447 (or 459441 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 136449819 is about 11681.1736995903. The cubic root of 136449819 is about 514.8226605290.

The spelling of 136449819 in words is "one hundred thirty-six million, four hundred forty-nine thousand, eight hundred nineteen".