43491097 has 8 divisors (see below), whose sum is σ = 48452040. Its totient is φ = 38760960.

The previous prime is 43491073. The next prime is 43491131. The reversal of 43491097 is 79019434.

It can be written as a sum of positive squares in 4 ways, for example, as 7778521 + 35712576 = 2789^2 + 5976^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43491097 - 2⁷ = 43490969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43491067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57304 + ... + 58057.

It is an arithmetic number, because the mean of its divisors is an integer number (6056505).

Almost surely, 2^43491097 is an apocalyptic number.

It is an amenable number.

43491097 is a deficient number, since it is larger than the sum of its proper divisors (4960943).

43491097 is a wasteful number, since it uses less digits than its factorization.

43491097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115403.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 43491097 is about 6594.7780099106. The cubic root of 43491097 is about 351.6684879201.

The spelling of 43491097 in words is "forty-three million, four hundred ninety-one thousand, ninety-seven".