45637993 has 2 divisors, whose sum is σ = 45637994. Its totient is φ = 45637992.

The previous prime is 45637951. The next prime is 45637997. The reversal of 45637993 is 39973654.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45333289 + 304704 = 6733^2 + 552^2 .

It is a cyclic number.

It is not a de Polignac number, because 45637993 - 2⁹ = 45637481 is a prime.

It is not a weakly prime, because it can be changed into another prime (45637997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22818996 + 22818997.

It is an arithmetic number, because the mean of its divisors is an integer number (22818997).

Almost surely, 2^45637993 is an apocalyptic number.

It is an amenable number.

45637993 is a deficient number, since it is larger than the sum of its proper divisors (1).

45637993 is an equidigital number, since it uses as much as digits as its factorization.

45637993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 46.

The square root of 45637993 is about 6755.5897595991. The cubic root of 45637993 is about 357.3623914940.

The spelling of 45637993 in words is "forty-five million, six hundred thirty-seven thousand, nine hundred ninety-three".