45983721 has 16 divisors (see below), whose sum is σ = 70716800. Its totient is φ = 26034048.

The previous prime is 45983699. The next prime is 45983737. The reversal of 45983721 is 12738954.

It is not a de Polignac number, because 45983721 - 2⁵ = 45983689 is a prime.

It is a super-2 number, since 2×45983721² = 4229005194011682, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 45983721.

It is not an unprimeable number, because it can be changed into a prime (45983761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7756 + ... + 12333.

It is an arithmetic number, because the mean of its divisors is an integer number (4419800).

Almost surely, 2^45983721 is an apocalyptic number.

It is an amenable number.

45983721 is a deficient number, since it is larger than the sum of its proper divisors (24733079).

45983721 is a wasteful number, since it uses less digits than its factorization.

45983721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20208.

The product of its digits is 60480, while the sum is 39.

The square root of 45983721 is about 6781.1297731278. The cubic root of 45983721 is about 358.2625151318.

The spelling of 45983721 in words is "forty-five million, nine hundred eighty-three thousand, seven hundred twenty-one".