1695987793 has 2 divisors, whose sum is σ = 1695987794. Its totient is φ = 1695987792.

The previous prime is 1695987791. The next prime is 1695987829. The reversal of 1695987793 is 3977895961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1141291089 + 554696704 = 33783^2 + 23552^2 .

It is a cyclic number.

It is not a de Polignac number, because 1695987793 - 2¹ = 1695987791 is a prime.

Together with 1695987791, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1695987791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 847993896 + 847993897.

It is an arithmetic number, because the mean of its divisors is an integer number (847993897).

Almost surely, 2^1695987793 is an apocalyptic number.

It is an amenable number.

1695987793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1695987793 is an equidigital number, since it uses as much as digits as its factorization.

1695987793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25719120, while the sum is 64.

The square root of 1695987793 is about 41182.3723575998. The cubic root of 1695987793 is about 1192.5435304149.

The spelling of 1695987793 in words is "one billion, six hundred ninety-five million, nine hundred eighty-seven thousand, seven hundred ninety-three".