40089641 has 2 divisors, whose sum is σ = 40089642. Its totient is φ = 40089640.

The previous prime is 40089619. The next prime is 40089649. The reversal of 40089641 is 14698004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32444416 + 7645225 = 5696^2 + 2765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40089641 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40089598 and 40089607.

It is not a weakly prime, because it can be changed into another prime (40089649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20044820 + 20044821.

It is an arithmetic number, because the mean of its divisors is an integer number (20044821).

Almost surely, 2^40089641 is an apocalyptic number.

It is an amenable number.

40089641 is a deficient number, since it is larger than the sum of its proper divisors (1).

40089641 is an equidigital number, since it uses as much as digits as its factorization.

40089641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 40089641 is about 6331.6380976806. The cubic root of 40089641 is about 342.2504719883.

The spelling of 40089641 in words is "forty million, eighty-nine thousand, six hundred forty-one".