40765691 has 2 divisors, whose sum is σ = 40765692. Its totient is φ = 40765690.

The previous prime is 40765679. The next prime is 40765709. The reversal of 40765691 is 19656704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40765691 - 2²² = 36571387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40765631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20382845 + 20382846.

It is an arithmetic number, because the mean of its divisors is an integer number (20382846).

Almost surely, 2^40765691 is an apocalyptic number.

40765691 is a deficient number, since it is larger than the sum of its proper divisors (1).

40765691 is an equidigital number, since it uses as much as digits as its factorization.

40765691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 40765691 is about 6384.8015630871. The cubic root of 40765691 is about 344.1636001840.

The spelling of 40765691 in words is "forty million, seven hundred sixty-five thousand, six hundred ninety-one".