43198643 has 2 divisors, whose sum is σ = 43198644. Its totient is φ = 43198642.

The previous prime is 43198637. The next prime is 43198667. The reversal of 43198643 is 34689134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43198643 - 2⁶ = 43198579 is a prime.

It is a super-2 number, since 2×43198643² = 3732245514082898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 43198597 and 43198606.

It is not a weakly prime, because it can be changed into another prime (43198613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21599321 + 21599322.

It is an arithmetic number, because the mean of its divisors is an integer number (21599322).

Almost surely, 2^43198643 is an apocalyptic number.

43198643 is a deficient number, since it is larger than the sum of its proper divisors (1).

43198643 is an equidigital number, since it uses as much as digits as its factorization.

43198643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 43198643 is about 6572.5674587637. The cubic root of 43198643 is about 350.8784545729.

The spelling of 43198643 in words is "forty-three million, one hundred ninety-eight thousand, six hundred forty-three".