1021088797 has 4 divisors (see below), whose sum is σ = 1021168060. Its totient is φ = 1021009536.

The previous prime is 1021088773. The next prime is 1021088807. The reversal of 1021088797 is 7978801201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7978801201 = 7 ⋅1139828743.

It can be written as a sum of positive squares in 2 ways, for example, as 164121721 + 856967076 = 12811^2 + 29274^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021088797 - 2⁷ = 1021088669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021088737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15348 + ... + 47725.

It is an arithmetic number, because the mean of its divisors is an integer number (255292015).

Almost surely, 2^1021088797 is an apocalyptic number.

It is an amenable number.

1021088797 is a deficient number, since it is larger than the sum of its proper divisors (79263).

1021088797 is an equidigital number, since it uses as much as digits as its factorization.

1021088797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79262.

The product of its (nonzero) digits is 56448, while the sum is 43.

The square root of 1021088797 is about 31954.4800771347. The cubic root of 1021088797 is about 1006.9807546713.

Adding to 1021088797 its reverse (7978801201), we get a palindrome (8999889998).

The spelling of 1021088797 in words is "one billion, twenty-one million, eighty-eight thousand, seven hundred ninety-seven".