136320553 has 4 divisors (see below), whose sum is σ = 136600960. Its totient is φ = 136040148.

The previous prime is 136320551. The next prime is 136320571. The reversal of 136320553 is 355023631.

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: 355023631 = 17 ⋅20883743.

It is a cyclic number.

It is not a de Polignac number, because 136320553 - 2¹ = 136320551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136320551) 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, 139473 + ... + 140446.

It is an arithmetic number, because the mean of its divisors is an integer number (34150240).

Almost surely, 2^136320553 is an apocalyptic number.

It is an amenable number.

136320553 is a deficient number, since it is larger than the sum of its proper divisors (280407).

136320553 is an equidigital number, since it uses as much as digits as its factorization.

136320553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280406.

The product of its (nonzero) digits is 8100, while the sum is 28.

The square root of 136320553 is about 11675.6392972719. The cubic root of 136320553 is about 514.6600364163.

The spelling of 136320553 in words is "one hundred thirty-six million, three hundred twenty thousand, five hundred fifty-three".