453689993 has 2 divisors, whose sum is σ = 453689994. Its totient is φ = 453689992.

The previous prime is 453689989. The next prime is 453690059. The reversal of 453689993 is 399986354.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374693449 + 78996544 = 19357^2 + 8888^2 .

It is a cyclic number.

It is not a de Polignac number, because 453689993 - 2² = 453689989 is a prime.

It is not a weakly prime, because it can be changed into another prime (453689903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226844996 + 226844997.

It is an arithmetic number, because the mean of its divisors is an integer number (226844997).

Almost surely, 2^453689993 is an apocalyptic number.

It is an amenable number.

453689993 is a deficient number, since it is larger than the sum of its proper divisors (1).

453689993 is an equidigital number, since it uses as much as digits as its factorization.

453689993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6298560, while the sum is 56.

The square root of 453689993 is about 21299.9998356808. Note that the first 3 decimals coincide. The cubic root of 453689993 is about 768.3983083136.

The spelling of 453689993 in words is "four hundred fifty-three million, six hundred eighty-nine thousand, nine hundred ninety-three".