45431993 has 2 divisors, whose sum is σ = 45431994. Its totient is φ = 45431992.

The previous prime is 45431941. The next prime is 45432001. The reversal of 45431993 is 39913454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23454649 + 21977344 = 4843^2 + 4688^2 .

It is a cyclic number.

It is not a de Polignac number, because 45431993 - 2¹⁰ = 45430969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (45434993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22715996 + 22715997.

It is an arithmetic number, because the mean of its divisors is an integer number (22715997).

Almost surely, 2^45431993 is an apocalyptic number.

It is an amenable number.

45431993 is a deficient number, since it is larger than the sum of its proper divisors (1).

45431993 is an equidigital number, since it uses as much as digits as its factorization.

45431993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 38.

The square root of 45431993 is about 6740.3258823294. The cubic root of 45431993 is about 356.8238950236.

The spelling of 45431993 in words is "forty-five million, four hundred thirty-one thousand, nine hundred ninety-three".