136240537 has 4 divisors (see below), whose sum is σ = 136264996. Its totient is φ = 136216080.

The previous prime is 136240513. The next prime is 136240553. The reversal of 136240537 is 735042631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 735042631 = 5653 ⋅130027.

It can be written as a sum of positive squares in 2 ways, for example, as 68079001 + 68161536 = 8251^2 + 8256^2 .

It is a cyclic number.

It is not a de Polignac number, because 136240537 - 2¹¹ = 136238489 is a prime.

It is a super-2 number, since 2×136240537² = 37122967844096738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136240499 and 136240508.

It is not an unprimeable number, because it can be changed into a prime (136240037) 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, 643 + ... + 16519.

It is an arithmetic number, because the mean of its divisors is an integer number (34066249).

Almost surely, 2^136240537 is an apocalyptic number.

It is an amenable number.

136240537 is a deficient number, since it is larger than the sum of its proper divisors (24459).

136240537 is an equidigital number, since it uses as much as digits as its factorization.

136240537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24458.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 136240537 is about 11672.2121725061. The cubic root of 136240537 is about 514.5593201351.

The spelling of 136240537 in words is "one hundred thirty-six million, two hundred forty thousand, five hundred thirty-seven".