43397639041 has 9 divisors (see below), whose sum is σ = 44490690889. Its totient is φ = 42330827200.

The previous prime is 43397639023. The next prime is 43397639093. The reversal of 43397639041 is 14093679334.

The square root of 43397639041 is 208321.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 29539640641 + 13857998400 = 171871^2 + 117720^2 .

It is not a de Polignac number, because 43397639041 - 2¹⁷ = 43397507969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43397639141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8538621 + ... + 8543701.

Almost surely, 2^43397639041 is an apocalyptic number.

43397639041 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

43397639041 is the 208321-st square number.

43397639041 is the 104161-st centered octagonal number.

It is an amenable number.

43397639041 is a deficient number, since it is larger than the sum of its proper divisors (1093051848).

43397639041 is an frugal number, since it uses more digits than its factorization.

43397639041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10244 (or 5122 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 49.

Multiplying 43397639041 by its sum of digits (49), we get a square (2126484313009 = 1458247²).

The spelling of 43397639041 in words is "forty-three billion, three hundred ninety-seven million, six hundred thirty-nine thousand, forty-one".