993434503 has 2 divisors, whose sum is σ = 993434504. Its totient is φ = 993434502.

The previous prime is 993434483. The next prime is 993434509. The reversal of 993434503 is 305434399.

It is a strong prime.

It is an emirp because it is prime and its reverse (305434399) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993434503 is a prime.

It is a super-2 number, since 2×993434503² = 1973824223501714018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993434509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496717251 + 496717252.

It is an arithmetic number, because the mean of its divisors is an integer number (496717252).

Almost surely, 2^993434503 is an apocalyptic number.

993434503 is a deficient number, since it is larger than the sum of its proper divisors (1).

993434503 is an equidigital number, since it uses as much as digits as its factorization.

993434503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 40.

The square root of 993434503 is about 31518.7960271328. The cubic root of 993434503 is about 997.8066939255.

The spelling of 993434503 in words is "nine hundred ninety-three million, four hundred thirty-four thousand, five hundred three".