40938739 has 4 divisors (see below), whose sum is σ = 41809824. Its totient is φ = 40067656.

The previous prime is 40938731. The next prime is 40938773. The reversal of 40938739 is 93783904.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40938739 - 2³ = 40938731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40938695 and 40938704.

It is not an unprimeable number, because it can be changed into a prime (40938731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435472 + ... + 435565.

It is an arithmetic number, because the mean of its divisors is an integer number (10452456).

Almost surely, 2^40938739 is an apocalyptic number.

40938739 is a deficient number, since it is larger than the sum of its proper divisors (871085).

40938739 is an equidigital number, since it uses as much as digits as its factorization.

40938739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871084.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 40938739 is about 6398.3387687743. The cubic root of 40938739 is about 344.6498975879.

The spelling of 40938739 in words is "forty million, nine hundred thirty-eight thousand, seven hundred thirty-nine".