40138699 has 2 divisors, whose sum is σ = 40138700. Its totient is φ = 40138698.

The previous prime is 40138687. The next prime is 40138711. The reversal of 40138699 is 99683104.

It is a balanced prime because it is at equal distance from previous prime (40138687) and next prime (40138711).

It is a cyclic number.

It is not a de Polignac number, because 40138699 - 2¹¹ = 40136651 is a prime.

It is a super-2 number, since 2×40138699² = 3222230314825202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40138999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20069349 + 20069350.

It is an arithmetic number, because the mean of its divisors is an integer number (20069350).

Almost surely, 2^40138699 is an apocalyptic number.

40138699 is a deficient number, since it is larger than the sum of its proper divisors (1).

40138699 is an equidigital number, since it uses as much as digits as its factorization.

40138699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 40138699 is about 6335.5109501918. The cubic root of 40138699 is about 342.3900199210.

The spelling of 40138699 in words is "forty million, one hundred thirty-eight thousand, six hundred ninety-nine".