40140493 has 2 divisors, whose sum is σ = 40140494. Its totient is φ = 40140492.

The previous prime is 40140469. The next prime is 40140511. The reversal of 40140493 is 39404104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25532809 + 14607684 = 5053^2 + 3822^2 .

It is a cyclic number.

It is not a de Polignac number, because 40140493 - 2⁵ = 40140461 is a prime.

It is a super-2 number, since 2×40140493² = 3222518356566098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40140403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20070246 + 20070247.

It is an arithmetic number, because the mean of its divisors is an integer number (20070247).

Almost surely, 2^40140493 is an apocalyptic number.

It is an amenable number.

40140493 is a deficient number, since it is larger than the sum of its proper divisors (1).

40140493 is an equidigital number, since it uses as much as digits as its factorization.

40140493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 40140493 is about 6335.6525315077. The cubic root of 40140493 is about 342.3951208881.

Adding to 40140493 its reverse (39404104), we get a palindrome (79544597).

The spelling of 40140493 in words is "forty million, one hundred forty thousand, four hundred ninety-three".