40093639 has 2 divisors, whose sum is σ = 40093640. Its totient is φ = 40093638.

The previous prime is 40093619. The next prime is 40093657. The reversal of 40093639 is 93639004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40093639 - 2⁷ = 40093511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40093619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20046819 + 20046820.

It is an arithmetic number, because the mean of its divisors is an integer number (20046820).

Almost surely, 2^40093639 is an apocalyptic number.

40093639 is a deficient number, since it is larger than the sum of its proper divisors (1).

40093639 is an equidigital number, since it uses as much as digits as its factorization.

40093639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 40093639 is about 6331.9538058959. The cubic root of 40093639 is about 342.2618487586.

The spelling of 40093639 in words is "forty million, ninety-three thousand, six hundred thirty-nine".