45447919 has 16 divisors (see below), whose sum is σ = 53623296. Its totient is φ = 38051200.

The previous prime is 45447917. The next prime is 45447949. The reversal of 45447919 is 91974454.

It is not a de Polignac number, because 45447919 - 2¹ = 45447917 is a prime.

It is a super-2 number, since 2×45447919² = 4131026682861122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45447917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6204 + ... + 11374.

It is an arithmetic number, because the mean of its divisors is an integer number (3351456).

Almost surely, 2^45447919 is an apocalyptic number.

45447919 is a deficient number, since it is larger than the sum of its proper divisors (8175377).

45447919 is a wasteful number, since it uses less digits than its factorization.

45447919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5246.

The product of its digits is 181440, while the sum is 43.

The square root of 45447919 is about 6741.5071756989. The cubic root of 45447919 is about 356.8655845400.

The spelling of 45447919 in words is "forty-five million, four hundred forty-seven thousand, nine hundred nineteen".