40302293 has 2 divisors, whose sum is σ = 40302294. Its totient is φ = 40302292.

The previous prime is 40302289. The next prime is 40302319. The reversal of 40302293 is 39220304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40233649 + 68644 = 6343^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 40302293 - 2² = 40302289 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40302203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20151146 + 20151147.

It is an arithmetic number, because the mean of its divisors is an integer number (20151147).

Almost surely, 2^40302293 is an apocalyptic number.

It is an amenable number.

40302293 is a deficient number, since it is larger than the sum of its proper divisors (1).

40302293 is an equidigital number, since it uses as much as digits as its factorization.

40302293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 40302293 is about 6348.4086982487. The cubic root of 40302293 is about 342.8545510634.

Adding to 40302293 its reverse (39220304), we get a palindrome (79522597).

The spelling of 40302293 in words is "forty million, three hundred two thousand, two hundred ninety-three".