40239293 has 2 divisors, whose sum is σ = 40239294. Its totient is φ = 40239292.

The previous prime is 40239247. The next prime is 40239301. The reversal of 40239293 is 39293204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31956409 + 8282884 = 5653^2 + 2878^2 .

It is a cyclic number.

It is not a de Polignac number, because 40239293 - 2¹² = 40235197 is a prime.

It is a super-2 number, since 2×40239293² = 3238401402279698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40239223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20119646 + 20119647.

It is an arithmetic number, because the mean of its divisors is an integer number (20119647).

Almost surely, 2^40239293 is an apocalyptic number.

It is an amenable number.

40239293 is a deficient number, since it is larger than the sum of its proper divisors (1).

40239293 is an equidigital number, since it uses as much as digits as its factorization.

40239293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 40239293 is about 6343.4448842880. Note that the first 3 decimals coincide. The cubic root of 40239293 is about 342.6758093612.

The spelling of 40239293 in words is "forty million, two hundred thirty-nine thousand, two hundred ninety-three".