45905381 has 4 divisors (see below), whose sum is σ = 46972992. Its totient is φ = 44837772.

The previous prime is 45905369. The next prime is 45905383. The reversal of 45905381 is 18350954.

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: 18350954 = 2 ⋅9175477.

It is a cyclic number.

It is not a de Polignac number, because 45905381 - 2⁶ = 45905317 is a prime.

It is a super-3 number, since 3×45905381³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45905383) 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, 533741 + ... + 533826.

It is an arithmetic number, because the mean of its divisors is an integer number (11743248).

Almost surely, 2^45905381 is an apocalyptic number.

It is an amenable number.

45905381 is a deficient number, since it is larger than the sum of its proper divisors (1067611).

45905381 is a wasteful number, since it uses less digits than its factorization.

45905381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067610.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 45905381 is about 6775.3509872183. The cubic root of 45905381 is about 358.0589486068.

The spelling of 45905381 in words is "forty-five million, nine hundred five thousand, three hundred eighty-one".