40727993 has 2 divisors, whose sum is σ = 40727994. Its totient is φ = 40727992.

The previous prime is 40727989. The next prime is 40728019. The reversal of 40727993 is 39972704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22306729 + 18421264 = 4723^2 + 4292^2 .

It is a cyclic number.

It is not a de Polignac number, because 40727993 - 2² = 40727989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40727993.

It is not a weakly prime, because it can be changed into another prime (40727693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20363996 + 20363997.

It is an arithmetic number, because the mean of its divisors is an integer number (20363997).

Almost surely, 2^40727993 is an apocalyptic number.

It is an amenable number.

40727993 is a deficient number, since it is larger than the sum of its proper divisors (1).

40727993 is an equidigital number, since it uses as much as digits as its factorization.

40727993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 40727993 is about 6381.8487133432. The cubic root of 40727993 is about 344.0574792405.

It can be divided in two parts, 407 and 27993, that multiplied together give a triangular number (11393151 = T₄₇₇₃).

The spelling of 40727993 in words is "forty million, seven hundred twenty-seven thousand, nine hundred ninety-three".