40647137 has 4 divisors (see below), whose sum is σ = 42786480. Its totient is φ = 38507796.

The previous prime is 40647133. The next prime is 40647149. The reversal of 40647137 is 73174604.

It is a happy number.

40647137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 40647137 - 2² = 40647133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40647133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1069643 + ... + 1069680.

It is an arithmetic number, because the mean of its divisors is an integer number (10696620).

Almost surely, 2^40647137 is an apocalyptic number.

It is an amenable number.

40647137 is a deficient number, since it is larger than the sum of its proper divisors (2139343).

40647137 is a wasteful number, since it uses less digits than its factorization.

40647137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139342.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 40647137 is about 6375.5107246400. The cubic root of 40647137 is about 343.8296462499.

The spelling of 40647137 in words is "forty million, six hundred forty-seven thousand, one hundred thirty-seven".