45399 has 8 divisors (see below), whose sum is σ = 62320. Its totient is φ = 29376.

The previous prime is 45389. The next prime is 45403. The reversal of 45399 is 99354.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45399 - 2⁹ = 44887 is a prime.

It is a super-2 number, since 2×45399² = 4122138402, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12 and base 14.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94 + ... + 315.

It is an arithmetic number, because the mean of its divisors is an integer number (7790).

2⁴⁵³⁹⁹ is an apocalyptic number.

45399 is a deficient number, since it is larger than the sum of its proper divisors (16921).

45399 is a wasteful number, since it uses less digits than its factorization.

45399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449.

The product of its digits is 4860, while the sum is 30.

The square root of 45399 is about 213.0704108974. The cubic root of 45399 is about 35.6737498185.

Subtracting from 45399 its sum of digits (30), we obtain a square (45369 = 213²).

It can be divided in two parts, 45 and 399, that multiplied together give a triangular number (17955 = T₁₈₉).

The spelling of 45399 in words is "forty-five thousand, three hundred ninety-nine".