40989943 has 2 divisors, whose sum is σ = 40989944. Its totient is φ = 40989942.

The previous prime is 40989931. The next prime is 40989953. The reversal of 40989943 is 34998904.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40989943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40989893 and 40989902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40989913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20494971 + 20494972.

It is an arithmetic number, because the mean of its divisors is an integer number (20494972).

Almost surely, 2^40989943 is an apocalyptic number.

40989943 is a deficient number, since it is larger than the sum of its proper divisors (1).

40989943 is an equidigital number, since it uses as much as digits as its factorization.

40989943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 40989943 is about 6402.3388695070. The cubic root of 40989943 is about 344.7935276508.

It can be divided in two parts, 4098 and 9943, that added together give a palindrome (14041).

The spelling of 40989943 in words is "forty million, nine hundred eighty-nine thousand, nine hundred forty-three".