43954591 has 2 divisors, whose sum is σ = 43954592. Its totient is φ = 43954590.

The previous prime is 43954579. The next prime is 43954597. The reversal of 43954591 is 19545934.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43954591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43954597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21977295 + 21977296.

It is an arithmetic number, because the mean of its divisors is an integer number (21977296).

Almost surely, 2^43954591 is an apocalyptic number.

43954591 is a deficient number, since it is larger than the sum of its proper divisors (1).

43954591 is an equidigital number, since it uses as much as digits as its factorization.

43954591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 40.

The square root of 43954591 is about 6629.8258649832. The cubic root of 43954591 is about 352.9133450728.

The spelling of 43954591 in words is "forty-three million, nine hundred fifty-four thousand, five hundred ninety-one".