662993893 has 2 divisors, whose sum is σ = 662993894. Its totient is φ = 662993892.

The previous prime is 662993879. The next prime is 662993921. The reversal of 662993893 is 398399266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 524272609 + 138721284 = 22897^2 + 11778^2 .

It is a cyclic number.

It is not a de Polignac number, because 662993893 - 2⁹ = 662993381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662993873) 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 as a sum of consecutive naturals, namely, 331496946 + 331496947.

It is an arithmetic number, because the mean of its divisors is an integer number (331496947).

Almost surely, 2^662993893 is an apocalyptic number.

It is an amenable number.

662993893 is a deficient number, since it is larger than the sum of its proper divisors (1).

662993893 is an equidigital number, since it uses as much as digits as its factorization.

662993893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 55.

The square root of 662993893 is about 25748.6677907809. The cubic root of 662993893 is about 871.9732780332.

The spelling of 662993893 in words is "six hundred sixty-two million, nine hundred ninety-three thousand, eight hundred ninety-three".