43420333457 has 2 divisors, whose sum is σ = 43420333458. Its totient is φ = 43420333456.

The previous prime is 43420333399. The next prime is 43420333531. The reversal of 43420333457 is 75433302434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30751480321 + 12668853136 = 175361^2 + 112556^2 .

It is a cyclic number.

It is not a de Polignac number, because 43420333457 - 2¹⁰ = 43420332433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43420333457.

It is not a weakly prime, because it can be changed into another prime (43420332457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21710166728 + 21710166729.

It is an arithmetic number, because the mean of its divisors is an integer number (21710166729).

Almost surely, 2^43420333457 is an apocalyptic number.

It is an amenable number.

43420333457 is a deficient number, since it is larger than the sum of its proper divisors (1).

43420333457 is an equidigital number, since it uses as much as digits as its factorization.

43420333457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 38.

The spelling of 43420333457 in words is "forty-three billion, four hundred twenty million, three hundred thirty-three thousand, four hundred fifty-seven".