40872071 has 2 divisors, whose sum is σ = 40872072. Its totient is φ = 40872070.

The previous prime is 40872067. The next prime is 40872101. The reversal of 40872071 is 17027804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40872071 - 2² = 40872067 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40872011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20436035 + 20436036.

It is an arithmetic number, because the mean of its divisors is an integer number (20436036).

Almost surely, 2^40872071 is an apocalyptic number.

40872071 is a deficient number, since it is larger than the sum of its proper divisors (1).

40872071 is an equidigital number, since it uses as much as digits as its factorization.

40872071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 40872071 is about 6393.1268562418. The cubic root of 40872071 is about 344.4627105548.

Adding to 40872071 its reverse (17027804), we get a palindrome (57899875).

The spelling of 40872071 in words is "forty million, eight hundred seventy-two thousand, seventy-one".