137445638 has 8 divisors (see below), whose sum is σ = 224911080. Its totient is φ = 62475280.

The previous prime is 137445613. The next prime is 137445643. The reversal of 137445638 is 836544731.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 137445595 and 137445604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3123743 + ... + 3123786.

It is an arithmetic number, because the mean of its divisors is an integer number (28113885).

Almost surely, 2^137445638 is an apocalyptic number.

137445638 is a deficient number, since it is larger than the sum of its proper divisors (87465442).

137445638 is a wasteful number, since it uses less digits than its factorization.

137445638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6247542.

The product of its digits is 241920, while the sum is 41.

The square root of 137445638 is about 11723.7211669333. The cubic root of 137445638 is about 516.0720283843.

The spelling of 137445638 in words is "one hundred thirty-seven million, four hundred forty-five thousand, six hundred thirty-eight".