137943917 has 4 divisors (see below), whose sum is σ = 138997056. Its totient is φ = 136890780.

The previous prime is 137943913. The next prime is 137943929. The reversal of 137943917 is 719349731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137943917 - 2² = 137943913 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 (137943913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526373 + ... + 526634.

It is an arithmetic number, because the mean of its divisors is an integer number (34749264).

Almost surely, 2^137943917 is an apocalyptic number.

It is an amenable number.

137943917 is a deficient number, since it is larger than the sum of its proper divisors (1053139).

137943917 is a wasteful number, since it uses less digits than its factorization.

137943917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053138.

The product of its digits is 142884, while the sum is 44.

The square root of 137943917 is about 11744.9528308972. The cubic root of 137943917 is about 516.6949115788.

The spelling of 137943917 in words is "one hundred thirty-seven million, nine hundred forty-three thousand, nine hundred seventeen".