137929909 has 8 divisors (see below), whose sum is σ = 148639232. Its totient is φ = 127234800.

The previous prime is 137929907. The next prime is 137929921. The reversal of 137929909 is 909929731.

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

It is a cyclic number.

It is not a de Polignac number, because 137929909 - 2¹ = 137929907 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 (137929901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25384 + ... + 30334.

It is an arithmetic number, because the mean of its divisors is an integer number (18579904).

Almost surely, 2^137929909 is an apocalyptic number.

It is an amenable number.

137929909 is a deficient number, since it is larger than the sum of its proper divisors (10709323).

137929909 is a wasteful number, since it uses less digits than its factorization.

137929909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7107.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 137929909 is about 11744.3564744945. The cubic root of 137929909 is about 516.6774211197.

The spelling of 137929909 in words is "one hundred thirty-seven million, nine hundred twenty-nine thousand, nine hundred nine".