1993739903 has 2 divisors, whose sum is σ = 1993739904. Its totient is φ = 1993739902.

The previous prime is 1993739897. The next prime is 1993739927. The reversal of 1993739903 is 3099373991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1993739903 - 2¹⁴ = 1993723519 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1993739933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996869951 + 996869952.

It is an arithmetic number, because the mean of its divisors is an integer number (996869952).

Almost surely, 2^1993739903 is an apocalyptic number.

1993739903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993739903 is an equidigital number, since it uses as much as digits as its factorization.

1993739903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1240029, while the sum is 53.

The square root of 1993739903 is about 44651.3146838926. The cubic root of 1993739903 is about 1258.6051379849.

The spelling of 1993739903 in words is "one billion, nine hundred ninety-three million, seven hundred thirty-nine thousand, nine hundred three".