40026659 has 2 divisors, whose sum is σ = 40026660. Its totient is φ = 40026658.

The previous prime is 40026643. The next prime is 40026689. The reversal of 40026659 is 95662004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40026659 - 2⁴ = 40026643 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 (40026629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20013329 + 20013330.

It is an arithmetic number, because the mean of its divisors is an integer number (20013330).

Almost surely, 2^40026659 is an apocalyptic number.

40026659 is a deficient number, since it is larger than the sum of its proper divisors (1).

40026659 is an equidigital number, since it uses as much as digits as its factorization.

40026659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 40026659 is about 6326.6625482951. The cubic root of 40026659 is about 342.0711495439.

The spelling of 40026659 in words is "forty million, twenty-six thousand, six hundred fifty-nine".