40267639 has 2 divisors, whose sum is σ = 40267640. Its totient is φ = 40267638.

The previous prime is 40267621. The next prime is 40267649. The reversal of 40267639 is 93676204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40267639 - 2⁷ = 40267511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40267598 and 40267607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40267649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20133819 + 20133820.

It is an arithmetic number, because the mean of its divisors is an integer number (20133820).

Almost surely, 2^40267639 is an apocalyptic number.

40267639 is a deficient number, since it is larger than the sum of its proper divisors (1).

40267639 is an equidigital number, since it uses as much as digits as its factorization.

40267639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 40267639 is about 6345.6787659005. The cubic root of 40267639 is about 342.7562548480.

The spelling of 40267639 in words is "forty million, two hundred sixty-seven thousand, six hundred thirty-nine".