43138491369 has 8 divisors (see below), whose sum is σ = 57526482912. Its totient is φ = 28754747040.

The previous prime is 43138491367. The next prime is 43138491371. The reversal of 43138491369 is 96319483134.

It is an interprime number because it is at equal distance from previous prime (43138491367) and next prime (43138491371).

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

It is not a de Polignac number, because 43138491369 - 2¹ = 43138491367 is a prime.

It is a super-2 number, since 2×43138491369² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43138491367) 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, 1038027 + ... + 1078784.

It is an arithmetic number, because the mean of its divisors is an integer number (7190810364).

Almost surely, 2^43138491369 is an apocalyptic number.

It is an amenable number.

43138491369 is a deficient number, since it is larger than the sum of its proper divisors (14387991543).

43138491369 is a wasteful number, since it uses less digits than its factorization.

43138491369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123607.

The product of its digits is 1679616, while the sum is 51.

It can be divided in two parts, 431384 and 91369, that added together give a triangular number (522753 = T₁₀₂₂).

The spelling of 43138491369 in words is "forty-three billion, one hundred thirty-eight million, four hundred ninety-one thousand, three hundred sixty-nine".