43734137 has 4 divisors (see below), whose sum is σ = 43825920. Its totient is φ = 43642356.

The previous prime is 43734113. The next prime is 43734151. The reversal of 43734137 is 73143734.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73143734 = 2 ⋅36571867.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43734137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43734337) 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, 45173 + ... + 46130.

It is an arithmetic number, because the mean of its divisors is an integer number (10956480).

Almost surely, 2^43734137 is an apocalyptic number.

It is an amenable number.

43734137 is a deficient number, since it is larger than the sum of its proper divisors (91783).

43734137 is an equidigital number, since it uses as much as digits as its factorization.

43734137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91782.

The product of its digits is 21168, while the sum is 32.

The square root of 43734137 is about 6613.1790388587. The cubic root of 43734137 is about 352.3223442933.

The spelling of 43734137 in words is "forty-three million, seven hundred thirty-four thousand, one hundred thirty-seven".