45651993 has 16 divisors (see below), whose sum is σ = 62515200. Its totient is φ = 29619216.

The previous prime is 45651979. The next prime is 45651997. The reversal of 45651993 is 39915654.

It is not a de Polignac number, because 45651993 - 2⁶ = 45651929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45651997) 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 15 ways as a sum of consecutive naturals, for example, 27246 + ... + 28872.

It is an arithmetic number, because the mean of its divisors is an integer number (3907200).

Almost surely, 2^45651993 is an apocalyptic number.

It is an amenable number.

45651993 is a deficient number, since it is larger than the sum of its proper divisors (16863207).

45651993 is a wasteful number, since it uses less digits than its factorization.

45651993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876.

The product of its digits is 145800, while the sum is 42.

The square root of 45651993 is about 6756.6258591104. The cubic root of 45651993 is about 357.3989294868.

The spelling of 45651993 in words is "forty-five million, six hundred fifty-one thousand, nine hundred ninety-three".