43085491 has 2 divisors, whose sum is σ = 43085492. Its totient is φ = 43085490.

The previous prime is 43085473. The next prime is 43085551. The reversal of 43085491 is 19458034.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43085491 - 2²⁵ = 9531059 is a prime.

It is a super-2 number, since 2×43085491² = 3712719069422162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43085401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21542745 + 21542746.

It is an arithmetic number, because the mean of its divisors is an integer number (21542746).

Almost surely, 2^43085491 is an apocalyptic number.

43085491 is a deficient number, since it is larger than the sum of its proper divisors (1).

43085491 is an equidigital number, since it uses as much as digits as its factorization.

43085491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 43085491 is about 6563.9539151338. The cubic root of 43085491 is about 350.5718298617.

The spelling of 43085491 in words is "forty-three million, eighty-five thousand, four hundred ninety-one".