137738709 has 12 divisors (see below), whose sum is σ = 210659436. Its totient is φ = 86424192.

The previous prime is 137738701. The next prime is 137738723. The reversal of 137738709 is 907837731.

It can be written as a sum of positive squares in 2 ways, for example, as 65658609 + 72080100 = 8103^2 + 8490^2 .

It is not a de Polignac number, because 137738709 - 2³ = 137738701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137738701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 449974 + ... + 450279.

It is an arithmetic number, because the mean of its divisors is an integer number (17554953).

Almost surely, 2^137738709 is an apocalyptic number.

It is an amenable number.

137738709 is a deficient number, since it is larger than the sum of its proper divisors (72920727).

137738709 is a wasteful number, since it uses less digits than its factorization.

137738709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900276 (or 900273 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 137738709 is about 11736.2135716763. The cubic root of 137738709 is about 516.4385693575.

The spelling of 137738709 in words is "one hundred thirty-seven million, seven hundred thirty-eight thousand, seven hundred nine".