40293971 has 2 divisors, whose sum is σ = 40293972. Its totient is φ = 40293970.

The previous prime is 40293947. The next prime is 40294013. The reversal of 40293971 is 17939204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40293971 - 2¹⁰ = 40292947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40293931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20146985 + 20146986.

It is an arithmetic number, because the mean of its divisors is an integer number (20146986).

Almost surely, 2^40293971 is an apocalyptic number.

40293971 is a deficient number, since it is larger than the sum of its proper divisors (1).

40293971 is an equidigital number, since it uses as much as digits as its factorization.

40293971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 40293971 is about 6347.7532245669. The cubic root of 40293971 is about 342.8309508183.

It can be divided in two parts, 4029 and 3971, that added together give a cube (8000 = 20³).

The spelling of 40293971 in words is "forty million, two hundred ninety-three thousand, nine hundred seventy-one".