1023117775 has 6 divisors (see below), whose sum is σ = 1268666072. Its totient is φ = 818494200.

The previous prime is 1023117773. The next prime is 1023117793. The reversal of 1023117775 is 5777113201.

It is a happy number.

It is not a de Polignac number, because 1023117775 - 2¹ = 1023117773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1023117775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023117773) 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, 20462331 + ... + 20462380.

Almost surely, 2^1023117775 is an apocalyptic number.

1023117775 is a deficient number, since it is larger than the sum of its proper divisors (245548297).

1023117775 is an equidigital number, since it uses as much as digits as its factorization.

1023117775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40924721 (or 40924716 counting only the distinct ones).

The product of its (nonzero) digits is 10290, while the sum is 34.

The square root of 1023117775 is about 31986.2122640365. The cubic root of 1023117775 is about 1007.6472948080.

The spelling of 1023117775 in words is "one billion, twenty-three million, one hundred seventeen thousand, seven hundred seventy-five".