43561597 has 2 divisors, whose sum is σ = 43561598. Its totient is φ = 43561596.

The previous prime is 43561589. The next prime is 43561607. The reversal of 43561597 is 79516534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36832761 + 6728836 = 6069^2 + 2594^2 .

It is a cyclic number.

It is not a de Polignac number, because 43561597 - 2³ = 43561589 is a prime.

It is a super-2 number, since 2×43561597² = 3795225466380818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43561577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21780798 + 21780799.

It is an arithmetic number, because the mean of its divisors is an integer number (21780799).

Almost surely, 2^43561597 is an apocalyptic number.

It is an amenable number.

43561597 is a deficient number, since it is larger than the sum of its proper divisors (1).

43561597 is an equidigital number, since it uses as much as digits as its factorization.

43561597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 40.

The square root of 43561597 is about 6600.1209837396. The cubic root of 43561597 is about 351.8584060543.

The spelling of 43561597 in words is "forty-three million, five hundred sixty-one thousand, five hundred ninety-seven".