40138711 has 2 divisors, whose sum is σ = 40138712. Its totient is φ = 40138710.

The previous prime is 40138699. The next prime is 40138729. The reversal of 40138711 is 11783104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40138711 - 2¹⁹ = 39614423 is a prime.

It is a super-2 number, since 2×40138711² = 3222232241483042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40138771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20069355 + 20069356.

It is an arithmetic number, because the mean of its divisors is an integer number (20069356).

Almost surely, 2^40138711 is an apocalyptic number.

40138711 is a deficient number, since it is larger than the sum of its proper divisors (1).

40138711 is an equidigital number, since it uses as much as digits as its factorization.

40138711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 40138711 is about 6335.5118972345. The cubic root of 40138711 is about 342.3900540417.

The spelling of 40138711 in words is "forty million, one hundred thirty-eight thousand, seven hundred eleven".