45123473 has 4 divisors (see below), whose sum is σ = 45142500. Its totient is φ = 45104448.

The previous prime is 45123451. The next prime is 45123487. The reversal of 45123473 is 37432154.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16265089 + 28858384 = 4033^2 + 5372^2 .

It is a cyclic number.

It is not a de Polignac number, because 45123473 - 2¹⁰ = 45122449 is a prime.

It is a super-2 number, since 2×45123473² = 4072255631163458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45123413) 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, 5348 + ... + 10901.

It is an arithmetic number, because the mean of its divisors is an integer number (11285625).

Almost surely, 2^45123473 is an apocalyptic number.

It is an amenable number.

45123473 is a deficient number, since it is larger than the sum of its proper divisors (19027).

45123473 is a wasteful number, since it uses less digits than its factorization.

45123473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19026.

The product of its digits is 10080, while the sum is 29.

The square root of 45123473 is about 6717.4007621996. The cubic root of 45123473 is about 356.0143520915.

The spelling of 45123473 in words is "forty-five million, one hundred twenty-three thousand, four hundred seventy-three".