1023995669 has 6 divisors (see below), whose sum is σ = 1043683746. Its totient is φ = 1004672240.

The previous prime is 1023995659. The next prime is 1023995701. The reversal of 1023995669 is 9665993201.

It can be written as a sum of positive squares in 3 ways, for example, as 111049444 + 912946225 = 10538^2 + 30215^2 .

It is not a de Polignac number, because 1023995669 - 2⁴ = 1023995653 is a prime.

It is a super-2 number, since 2×1023995669² = 2097134260261515122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023995659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 179462 + ... + 185079.

It is an arithmetic number, because the mean of its divisors is an integer number (173947291).

Almost surely, 2^1023995669 is an apocalyptic number.

It is an amenable number.

1023995669 is a deficient number, since it is larger than the sum of its proper divisors (19688077).

1023995669 is an frugal number, since it uses more digits than its factorization.

1023995669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364647 (or 364594 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 50.

The square root of 1023995669 is about 31999.9323280534. The cubic root of 1023995669 is about 1007.9354188936.

The spelling of 1023995669 in words is "one billion, twenty-three million, nine hundred ninety-five thousand, six hundred sixty-nine".