993994877 has 2 divisors, whose sum is σ = 993994878. Its totient is φ = 993994876.

The previous prime is 993994847. The next prime is 993994901. The reversal of 993994877 is 778499399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 789104281 + 204890596 = 28091^2 + 14314^2 .

It is a cyclic number.

It is not a de Polignac number, because 993994877 - 2¹⁴ = 993978493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993994847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496997438 + 496997439.

It is an arithmetic number, because the mean of its divisors is an integer number (496997439).

Almost surely, 2^993994877 is an apocalyptic number.

It is an amenable number.

993994877 is a deficient number, since it is larger than the sum of its proper divisors (1).

993994877 is an equidigital number, since it uses as much as digits as its factorization.

993994877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30862944, while the sum is 65.

The square root of 993994877 is about 31527.6842949177. The cubic root of 993994877 is about 997.9942720785.

The spelling of 993994877 in words is "nine hundred ninety-three million, nine hundred ninety-four thousand, eight hundred seventy-seven".