43520497 has 4 divisors (see below), whose sum is σ = 44924416. Its totient is φ = 42116580.

The previous prime is 43520489. The next prime is 43520501. The reversal of 43520497 is 79402534.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79402534 = 2 ⋅39701267.

It is a cyclic number.

It is not a de Polignac number, because 43520497 - 2³ = 43520489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43520417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 701913 + ... + 701974.

It is an arithmetic number, because the mean of its divisors is an integer number (11231104).

Almost surely, 2^43520497 is an apocalyptic number.

It is an amenable number.

43520497 is a deficient number, since it is larger than the sum of its proper divisors (1403919).

43520497 is a wasteful number, since it uses less digits than its factorization.

43520497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403918.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 43520497 is about 6597.0066696950. The cubic root of 43520497 is about 351.7477127531.

The spelling of 43520497 in words is "forty-three million, five hundred twenty thousand, four hundred ninety-seven".