40740691 has 2 divisors, whose sum is σ = 40740692. Its totient is φ = 40740690.

The previous prime is 40740683. The next prime is 40740719. The reversal of 40740691 is 19604704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40740691 - 2³ = 40740683 is a prime.

It is not a weakly prime, because it can be changed into another prime (40740611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20370345 + 20370346.

It is an arithmetic number, because the mean of its divisors is an integer number (20370346).

Almost surely, 2^40740691 is an apocalyptic number.

40740691 is a deficient number, since it is larger than the sum of its proper divisors (1).

40740691 is an equidigital number, since it uses as much as digits as its factorization.

40740691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 40740691 is about 6382.8434886029. The cubic root of 40740691 is about 344.0932317832.

The spelling of 40740691 in words is "forty million, seven hundred forty thousand, six hundred ninety-one".