1993464709 has 2 divisors, whose sum is σ = 1993464710. Its totient is φ = 1993464708.

The previous prime is 1993464679. The next prime is 1993464719. The reversal of 1993464709 is 9074643991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1646574084 + 346890625 = 40578^2 + 18625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1993464709 - 2¹⁷ = 1993333637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1993464719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996732354 + 996732355.

It is an arithmetic number, because the mean of its divisors is an integer number (996732355).

Almost surely, 2^1993464709 is an apocalyptic number.

It is an amenable number.

1993464709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993464709 is an equidigital number, since it uses as much as digits as its factorization.

1993464709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 1993464709 is about 44648.2329885517. The cubic root of 1993464709 is about 1258.5472273017.

The spelling of 1993464709 in words is "one billion, nine hundred ninety-three million, four hundred sixty-four thousand, seven hundred nine".