40118993 has 2 divisors, whose sum is σ = 40118994. Its totient is φ = 40118992.

The previous prime is 40118987. The next prime is 40118999. The reversal of 40118993 is 39981104.

It is a balanced prime because it is at equal distance from previous prime (40118987) and next prime (40118999).

It can be written as a sum of positive squares in only one way, i.e., 24373969 + 15745024 = 4937^2 + 3968^2 .

It is a cyclic number.

It is not a de Polignac number, because 40118993 - 2¹² = 40114897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40118999) 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, 20059496 + 20059497.

It is an arithmetic number, because the mean of its divisors is an integer number (20059497).

Almost surely, 2^40118993 is an apocalyptic number.

It is an amenable number.

40118993 is a deficient number, since it is larger than the sum of its proper divisors (1).

40118993 is an equidigital number, since it uses as much as digits as its factorization.

40118993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 40118993 is about 6333.9555571538. The cubic root of 40118993 is about 342.3339788903. Note that the first 3 decimals are identical.

The spelling of 40118993 in words is "forty million, one hundred eighteen thousand, nine hundred ninety-three".