43021709497 has 4 divisors (see below), whose sum is σ = 46331071780. Its totient is φ = 39712347216.

The previous prime is 43021709429. The next prime is 43021709501. The reversal of 43021709497 is 79490712034.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11289275001 + 31732434496 = 106251^2 + 178136^2 .

It is a cyclic number.

It is not a de Polignac number, because 43021709497 - 2¹⁹ = 43021185209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43021709197) 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, 1654681122 + ... + 1654681147.

It is an arithmetic number, because the mean of its divisors is an integer number (11582767945).

Almost surely, 2^43021709497 is an apocalyptic number.

It is an amenable number.

43021709497 is a deficient number, since it is larger than the sum of its proper divisors (3309362283).

43021709497 is a wasteful number, since it uses less digits than its factorization.

43021709497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309362282.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 43021709497 in words is "forty-three billion, twenty-one million, seven hundred nine thousand, four hundred ninety-seven".