40239427 has 2 divisors, whose sum is σ = 40239428. Its totient is φ = 40239426.

The previous prime is 40239389. The next prime is 40239439. The reversal of 40239427 is 72493204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40239427 is a prime.

It is a super-2 number, since 2×40239427² = 3238422970576658, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40239467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20119713 + 20119714.

It is an arithmetic number, because the mean of its divisors is an integer number (20119714).

Almost surely, 2^40239427 is an apocalyptic number.

40239427 is a deficient number, since it is larger than the sum of its proper divisors (1).

40239427 is an equidigital number, since it uses as much as digits as its factorization.

40239427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 40239427 is about 6343.4554463636. The cubic root of 40239427 is about 342.6761897399.

The spelling of 40239427 in words is "forty million, two hundred thirty-nine thousand, four hundred twenty-seven".