40328993 has 2 divisors, whose sum is σ = 40328994. Its totient is φ = 40328992.

The previous prime is 40328941. The next prime is 40328999. The reversal of 40328993 is 39982304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37063744 + 3265249 = 6088^2 + 1807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40328993 is a prime.

It is not a weakly prime, because it can be changed into another prime (40328999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20164496 + 20164497.

It is an arithmetic number, because the mean of its divisors is an integer number (20164497).

Almost surely, 2^40328993 is an apocalyptic number.

It is an amenable number.

40328993 is a deficient number, since it is larger than the sum of its proper divisors (1).

40328993 is an equidigital number, since it uses as much as digits as its factorization.

40328993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 40328993 is about 6350.5112392626. The cubic root of 40328993 is about 342.9302473000.

The spelling of 40328993 in words is "forty million, three hundred twenty-eight thousand, nine hundred ninety-three".