137440439 has 4 divisors (see below), whose sum is σ = 137951640. Its totient is φ = 136929240.

The previous prime is 137440423. The next prime is 137440477. The reversal of 137440439 is 934044731.

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

It is a cyclic number.

It is not a de Polignac number, because 137440439 - 2⁴ = 137440423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137440399 and 137440408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137440489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255197 + ... + 255734.

It is an arithmetic number, because the mean of its divisors is an integer number (34487910).

Almost surely, 2^137440439 is an apocalyptic number.

137440439 is a deficient number, since it is larger than the sum of its proper divisors (511201).

137440439 is an equidigital number, since it uses as much as digits as its factorization.

137440439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511200.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 137440439 is about 11723.4994348957. The cubic root of 137440439 is about 516.0655213455.

The spelling of 137440439 in words is "one hundred thirty-seven million, four hundred forty thousand, four hundred thirty-nine".