43599121 has 2 divisors, whose sum is σ = 43599122. Its totient is φ = 43599120.

The previous prime is 43599107. The next prime is 43599133. The reversal of 43599121 is 12199534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35533521 + 8065600 = 5961^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 43599121 - 2⁵ = 43599089 is a prime.

It is not a weakly prime, because it can be changed into another prime (43596121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21799560 + 21799561.

It is an arithmetic number, because the mean of its divisors is an integer number (21799561).

Almost surely, 2^43599121 is an apocalyptic number.

It is an amenable number.

43599121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43599121 is an equidigital number, since it uses as much as digits as its factorization.

43599121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 34.

The square root of 43599121 is about 6602.9630469964. The cubic root of 43599121 is about 351.9594074446.

The spelling of 43599121 in words is "forty-three million, five hundred ninety-nine thousand, one hundred twenty-one".