43954789 has 2 divisors, whose sum is σ = 43954790. Its totient is φ = 43954788.

The previous prime is 43954787. The next prime is 43954849. The reversal of 43954789 is 98745934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25421764 + 18533025 = 5042^2 + 4305^2 .

It is a cyclic number.

It is not a de Polignac number, because 43954789 - 2¹ = 43954787 is a prime.

Together with 43954787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43954783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21977394 + 21977395.

It is an arithmetic number, because the mean of its divisors is an integer number (21977395).

Almost surely, 2^43954789 is an apocalyptic number.

It is an amenable number.

43954789 is a deficient number, since it is larger than the sum of its proper divisors (1).

43954789 is an equidigital number, since it uses as much as digits as its factorization.

43954789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The square root of 43954789 is about 6629.8407974853. The cubic root of 43954789 is about 352.9138749889.

The spelling of 43954789 in words is "forty-three million, nine hundred fifty-four thousand, seven hundred eighty-nine".