136745641 has 4 divisors (see below), whose sum is σ = 143942800. Its totient is φ = 129548484.

The previous prime is 136745639. The next prime is 136745647. The reversal of 136745641 is 146547631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 146547631 = 619 ⋅236749.

It is a cyclic number.

It is not a de Polignac number, because 136745641 - 2¹ = 136745639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136745641.

It is not an unprimeable number, because it can be changed into a prime (136745647) 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 3 ways as a sum of consecutive naturals, for example, 3598551 + ... + 3598588.

It is an arithmetic number, because the mean of its divisors is an integer number (35985700).

Almost surely, 2^136745641 is an apocalyptic number.

It is an amenable number.

136745641 is a deficient number, since it is larger than the sum of its proper divisors (7197159).

136745641 is an equidigital number, since it uses as much as digits as its factorization.

136745641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7197158.

The product of its digits is 60480, while the sum is 37.

The square root of 136745641 is about 11693.8291846597. The cubic root of 136745641 is about 515.1944356472.

The spelling of 136745641 in words is "one hundred thirty-six million, seven hundred forty-five thousand, six hundred forty-one".