136938437 has 4 divisors (see below), whose sum is σ = 138814380. Its totient is φ = 135062496.

The previous prime is 136938433. The next prime is 136938449. The reversal of 136938437 is 734839631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50708641 + 86229796 = 7121^2 + 9286^2 .

It is a cyclic number.

It is not a de Polignac number, because 136938437 - 2² = 136938433 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136938433) 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, 937862 + ... + 938007.

It is an arithmetic number, because the mean of its divisors is an integer number (34703595).

Almost surely, 2^136938437 is an apocalyptic number.

It is an amenable number.

136938437 is a deficient number, since it is larger than the sum of its proper divisors (1875943).

136938437 is an equidigital number, since it uses as much as digits as its factorization.

136938437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875942.

The product of its digits is 326592, while the sum is 44.

The square root of 136938437 is about 11702.0697741895. The cubic root of 136938437 is about 515.4364440506.

The spelling of 136938437 in words is "one hundred thirty-six million, nine hundred thirty-eight thousand, four hundred thirty-seven".