43672091 has 2 divisors, whose sum is σ = 43672092. Its totient is φ = 43672090.

The previous prime is 43672073. The next prime is 43672117. The reversal of 43672091 is 19027634.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43672091 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43672001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21836045 + 21836046.

It is an arithmetic number, because the mean of its divisors is an integer number (21836046).

Almost surely, 2^43672091 is an apocalyptic number.

43672091 is a deficient number, since it is larger than the sum of its proper divisors (1).

43672091 is an equidigital number, since it uses as much as digits as its factorization.

43672091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 43672091 is about 6608.4862865864. The cubic root of 43672091 is about 352.1556511821.

It can be divided in two parts, 436 and 72091, that added together give a palindrome (72527).

The spelling of 43672091 in words is "forty-three million, six hundred seventy-two thousand, ninety-one".