43452389 has 2 divisors, whose sum is σ = 43452390. Its totient is φ = 43452388.

The previous prime is 43452371. The next prime is 43452397. The reversal of 43452389 is 98325434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30991489 + 12460900 = 5567^2 + 3530^2 .

It is a cyclic number.

It is not a de Polignac number, because 43452389 - 2¹⁶ = 43386853 is a prime.

It is a super-2 number, since 2×43452389² = 3776220219614642, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43452329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21726194 + 21726195.

It is an arithmetic number, because the mean of its divisors is an integer number (21726195).

Almost surely, 2^43452389 is an apocalyptic number.

It is an amenable number.

43452389 is a deficient number, since it is larger than the sum of its proper divisors (1).

43452389 is an equidigital number, since it uses as much as digits as its factorization.

43452389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 38.

The square root of 43452389 is about 6591.8426103784. The cubic root of 43452389 is about 351.5641261449.

The spelling of 43452389 in words is "forty-three million, four hundred fifty-two thousand, three hundred eighty-nine".