43504061 has 2 divisors, whose sum is σ = 43504062. Its totient is φ = 43504060.

The previous prime is 43504057. The next prime is 43504079. The reversal of 43504061 is 16040534.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40081561 + 3422500 = 6331^2 + 1850^2 .

It is a cyclic number.

It is not a de Polignac number, because 43504061 - 2² = 43504057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43504051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21752030 + 21752031.

It is an arithmetic number, because the mean of its divisors is an integer number (21752031).

Almost surely, 2^43504061 is an apocalyptic number.

It is an amenable number.

43504061 is a deficient number, since it is larger than the sum of its proper divisors (1).

43504061 is an equidigital number, since it uses as much as digits as its factorization.

43504061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 43504061 is about 6595.7608355670. The cubic root of 43504061 is about 351.7034266982.

Adding to 43504061 its reverse (16040534), we get a palindrome (59544595).

The spelling of 43504061 in words is "forty-three million, five hundred four thousand, sixty-one".