40768493 has 2 divisors, whose sum is σ = 40768494. Its totient is φ = 40768492.

The previous prime is 40768477. The next prime is 40768517. The reversal of 40768493 is 39486704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29626249 + 11142244 = 5443^2 + 3338^2 .

It is a cyclic number.

It is not a de Polignac number, because 40768493 - 2⁴ = 40768477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40768493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40768423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20384246 + 20384247.

It is an arithmetic number, because the mean of its divisors is an integer number (20384247).

Almost surely, 2^40768493 is an apocalyptic number.

It is an amenable number.

40768493 is a deficient number, since it is larger than the sum of its proper divisors (1).

40768493 is an equidigital number, since it uses as much as digits as its factorization.

40768493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 40768493 is about 6385.0209866531. The cubic root of 40768493 is about 344.1714852812.

The spelling of 40768493 in words is "forty million, seven hundred sixty-eight thousand, four hundred ninety-three".