43490099 has 4 divisors (see below), whose sum is σ = 43767264. Its totient is φ = 43212936.

The previous prime is 43490093. The next prime is 43490123. The reversal of 43490099 is 99009434.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43490099 - 2²⁰ = 42441523 is a prime.

It is a super-2 number, since 2×43490099² = 3782777422059602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43490093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138347 + ... + 138660.

It is an arithmetic number, because the mean of its divisors is an integer number (10941816).

Almost surely, 2^43490099 is an apocalyptic number.

43490099 is a deficient number, since it is larger than the sum of its proper divisors (277165).

43490099 is a wasteful number, since it uses less digits than its factorization.

43490099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277164.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 43490099 is about 6594.7023435482. The cubic root of 43490099 is about 351.6657979609.

The spelling of 43490099 in words is "forty-three million, four hundred ninety thousand, ninety-nine".