137443618 has 8 divisors (see below), whose sum is σ = 222024348. Its totient is φ = 63435504.

The previous prime is 137443573. The next prime is 137443619. The reversal of 137443618 is 816344731.

It can be written as a sum of positive squares in 2 ways, for example, as 108638929 + 28804689 = 10423^2 + 5367^2 .

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

It is not an unprimeable number, because it can be changed into a prime (137443619) 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, 2643121 + ... + 2643172.

Almost surely, 2^137443618 is an apocalyptic number.

137443618 is a deficient number, since it is larger than the sum of its proper divisors (84580730).

137443618 is a wasteful number, since it uses less digits than its factorization.

137443618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286308.

The product of its digits is 48384, while the sum is 37.

The square root of 137443618 is about 11723.6350164955. The cubic root of 137443618 is about 516.0695001833.

The spelling of 137443618 in words is "one hundred thirty-seven million, four hundred forty-three thousand, six hundred eighteen".