40539949 has 4 divisors (see below), whose sum is σ = 40553440. Its totient is φ = 40526460.

The previous prime is 40539943. The next prime is 40539953. The reversal of 40539949 is 94993504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40539949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40539943) 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, 34 + ... + 9004.

It is an arithmetic number, because the mean of its divisors is an integer number (10138360).

Almost surely, 2^40539949 is an apocalyptic number.

It is an amenable number.

40539949 is a deficient number, since it is larger than the sum of its proper divisors (13491).

40539949 is an equidigital number, since it uses as much as digits as its factorization.

40539949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13490.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 40539949 is about 6367.0989469302. The cubic root of 40539949 is about 343.5271497080.

The spelling of 40539949 in words is "forty million, five hundred thirty-nine thousand, nine hundred forty-nine".