41878509 has 4 divisors (see below), whose sum is σ = 55838016. Its totient is φ = 27919004.

The previous prime is 41878493. The next prime is 41878511. The reversal of 41878509 is 90587814.

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 41878509 - 2⁴ = 41878493 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41878519) 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, 6979749 + ... + 6979754.

It is an arithmetic number, because the mean of its divisors is an integer number (13959504).

Almost surely, 2^41878509 is an apocalyptic number.

It is an amenable number.

41878509 is a deficient number, since it is larger than the sum of its proper divisors (13959507).

41878509 is a wasteful number, since it uses less digits than its factorization.

41878509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13959506.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 41878509 is about 6471.3606760866. The cubic root of 41878509 is about 347.2671773441.

The spelling of 41878509 in words is "forty-one million, eight hundred seventy-eight thousand, five hundred nine".