40279243 has 2 divisors, whose sum is σ = 40279244. Its totient is φ = 40279242.

The previous prime is 40279237. The next prime is 40279249. The reversal of 40279243 is 34297204.

It is a balanced prime because it is at equal distance from previous prime (40279237) and next prime (40279249).

It is a cyclic number.

It is not a de Polignac number, because 40279243 - 2²¹ = 38182091 is a prime.

It is not a weakly prime, because it can be changed into another prime (40279249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20139621 + 20139622.

It is an arithmetic number, because the mean of its divisors is an integer number (20139622).

Almost surely, 2^40279243 is an apocalyptic number.

40279243 is a deficient number, since it is larger than the sum of its proper divisors (1).

40279243 is an equidigital number, since it uses as much as digits as its factorization.

40279243 is an evil number, because the sum of its binary digits is even.

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

The square root of 40279243 is about 6346.5930230321. The cubic root of 40279243 is about 342.7891759205.

The spelling of 40279243 in words is "forty million, two hundred seventy-nine thousand, two hundred forty-three".