137921849 has 8 divisors (see below), whose sum is σ = 148631112. Its totient is φ = 127226880.

The previous prime is 137921843. The next prime is 137921857. The reversal of 137921849 is 948129731.

It can be written as a sum of positive squares in 4 ways, for example, as 446224 + 137475625 = 668^2 + 11725^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137921849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137921843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24959 + ... + 29979.

It is an arithmetic number, because the mean of its divisors is an integer number (18578889).

Almost surely, 2^137921849 is an apocalyptic number.

It is an amenable number.

137921849 is a deficient number, since it is larger than the sum of its proper divisors (10709263).

137921849 is a wasteful number, since it uses less digits than its factorization.

137921849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7147.

The product of its digits is 108864, while the sum is 44.

The square root of 137921849 is about 11744.0133259461. The cubic root of 137921849 is about 516.6673568265.

The spelling of 137921849 in words is "one hundred thirty-seven million, nine hundred twenty-one thousand, eight hundred forty-nine".