1021313797 has 4 divisors (see below), whose sum is σ = 1167215776. Its totient is φ = 875411820.

The previous prime is 1021313767. The next prime is 1021313803. The reversal of 1021313797 is 7973131201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021313797 - 2²³ = 1012925189 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 (1021313747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72950979 + ... + 72950992.

It is an arithmetic number, because the mean of its divisors is an integer number (291803944).

Almost surely, 2^1021313797 is an apocalyptic number.

It is an amenable number.

1021313797 is a deficient number, since it is larger than the sum of its proper divisors (145901979).

1021313797 is an equidigital number, since it uses as much as digits as its factorization.

1021313797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145901978.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 1021313797 is about 31958.0005163026. Note that the first 3 decimals coincide. The cubic root of 1021313797 is about 1007.0547129894.

Adding to 1021313797 its reverse (7973131201), we get a palindrome (8994444998).

The spelling of 1021313797 in words is "one billion, twenty-one million, three hundred thirteen thousand, seven hundred ninety-seven".