1696743989 has 2 divisors, whose sum is σ = 1696743990. Its totient is φ = 1696743988.

The previous prime is 1696743967. The next prime is 1696744001. The reversal of 1696743989 is 9893476961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1305376900 + 391367089 = 36130^2 + 19783^2 .

It is a cyclic number.

It is not a de Polignac number, because 1696743989 - 2⁸ = 1696743733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1696743289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 848371994 + 848371995.

It is an arithmetic number, because the mean of its divisors is an integer number (848371995).

Almost surely, 2^1696743989 is an apocalyptic number.

It is an amenable number.

1696743989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1696743989 is an equidigital number, since it uses as much as digits as its factorization.

1696743989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17635968, while the sum is 62.

The square root of 1696743989 is about 41191.5523985198. The cubic root of 1696743989 is about 1192.7207452619.

The spelling of 1696743989 in words is "one billion, six hundred ninety-six million, seven hundred forty-three thousand, nine hundred eighty-nine".