45878909 has 4 divisors (see below), whose sum is σ = 46855104. Its totient is φ = 44902716.

The previous prime is 45878897. The next prime is 45878923. The reversal of 45878909 is 90987854.

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 an emirpimes, since its reverse is a distinct semiprime: 90987854 = 2 ⋅45493927.

It is a cyclic number.

It is not a de Polignac number, because 45878909 - 2⁸ = 45878653 is a prime.

It is a super-3 number, since 3×45878909³ (a number of 24 digits) contains 333 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45878969) 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, 488027 + ... + 488120.

It is an arithmetic number, because the mean of its divisors is an integer number (11713776).

Almost surely, 2^45878909 is an apocalyptic number.

It is an amenable number.

45878909 is a deficient number, since it is larger than the sum of its proper divisors (976195).

45878909 is an equidigital number, since it uses as much as digits as its factorization.

45878909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976194.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 45878909 is about 6773.3971535707. The cubic root of 45878909 is about 357.9901087537.

The spelling of 45878909 in words is "forty-five million, eight hundred seventy-eight thousand, nine hundred nine".