43263397 has 4 divisors (see below), whose sum is σ = 44432716. Its totient is φ = 42094080.

The previous prime is 43263379. The next prime is 43263401. The reversal of 43263397 is 79336234.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33189121 + 10074276 = 5761^2 + 3174^2 .

It is a cyclic number.

It is not a de Polignac number, because 43263397 - 2²³ = 34874789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1169281 = 43263397 / (4 + 3 + 2 + 6 + 3 + 3 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43263497) 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 3 ways as a sum of consecutive naturals, for example, 584604 + ... + 584677.

It is an arithmetic number, because the mean of its divisors is an integer number (11108179).

Almost surely, 2^43263397 is an apocalyptic number.

It is an amenable number.

43263397 is a deficient number, since it is larger than the sum of its proper divisors (1169319).

43263397 is a wasteful number, since it uses less digits than its factorization.

43263397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169318.

The product of its digits is 81648, while the sum is 37.

The square root of 43263397 is about 6577.4916951677. The cubic root of 43263397 is about 351.0536872395.

It can be divided in two parts, 43263 and 397, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 43263397 in words is "forty-three million, two hundred sixty-three thousand, three hundred ninety-seven".