136743505 has 8 divisors (see below), whose sum is σ = 164340072. Its totient is φ = 109229568.

The previous prime is 136743499. The next prime is 136743557. The reversal of 136743505 is 505347631.

It can be written as a sum of positive squares in 4 ways, for example, as 2461761 + 134281744 = 1569^2 + 11588^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136743505 - 2⁵ = 136743473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16954 + ... + 23683.

It is an arithmetic number, because the mean of its divisors is an integer number (20542509).

Almost surely, 2^136743505 is an apocalyptic number.

It is an amenable number.

136743505 is a deficient number, since it is larger than the sum of its proper divisors (27596567).

136743505 is an equidigital number, since it uses as much as digits as its factorization.

136743505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41315.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 136743505 is about 11693.7378540824. The cubic root of 136743505 is about 515.1917531460.

The spelling of 136743505 in words is "one hundred thirty-six million, seven hundred forty-three thousand, five hundred five".