40771639 has 2 divisors, whose sum is σ = 40771640. Its totient is φ = 40771638.

The previous prime is 40771637. The next prime is 40771667. The reversal of 40771639 is 93617704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40771639 - 2¹ = 40771637 is a prime.

It is a super-3 number, since 3×40771639³ (a number of 24 digits) contains 333 as substring.

Together with 40771637, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40771598 and 40771607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40771637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20385819 + 20385820.

It is an arithmetic number, because the mean of its divisors is an integer number (20385820).

Almost surely, 2^40771639 is an apocalyptic number.

40771639 is a deficient number, since it is larger than the sum of its proper divisors (1).

40771639 is an equidigital number, since it uses as much as digits as its factorization.

40771639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 40771639 is about 6385.2673397439. The cubic root of 40771639 is about 344.1803379970.

The spelling of 40771639 in words is "forty million, seven hundred seventy-one thousand, six hundred thirty-nine".