45490819 has 4 divisors (see below), whose sum is σ = 49626360. Its totient is φ = 41355280.

The previous prime is 45490787. The next prime is 45490891. The reversal of 45490819 is 91809454.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45490819 - 2⁵ = 45490787 is a prime.

It is a super-2 number, since 2×45490819² = 4138829226581522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45490019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2067754 + ... + 2067775.

It is an arithmetic number, because the mean of its divisors is an integer number (12406590).

Almost surely, 2^45490819 is an apocalyptic number.

45490819 is a deficient number, since it is larger than the sum of its proper divisors (4135541).

45490819 is a wasteful number, since it uses less digits than its factorization.

45490819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135540.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 45490819 is about 6744.6882062850. The cubic root of 45490819 is about 356.9778355103.

The spelling of 45490819 in words is "forty-five million, four hundred ninety thousand, eight hundred nineteen".