1021313653 has 4 divisors (see below), whose sum is σ = 1021377760. Its totient is φ = 1021249548.

The previous prime is 1021313617. The next prime is 1021313663. The reversal of 1021313653 is 3563131201.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1021313653 - 2⁹ = 1021313141 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 (1021313603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12328 + ... + 46846.

It is an arithmetic number, because the mean of its divisors is an integer number (255344440).

Almost surely, 2^1021313653 is an apocalyptic number.

It is an amenable number.

1021313653 is a deficient number, since it is larger than the sum of its proper divisors (64107).

1021313653 is an equidigital number, since it uses as much as digits as its factorization.

1021313653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64106.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1021313653 is about 31957.9982633456. The cubic root of 1021313653 is about 1007.0546656595.

Adding to 1021313653 its reverse (3563131201), we get a palindrome (4584444854).

The spelling of 1021313653 in words is "one billion, twenty-one million, three hundred thirteen thousand, six hundred fifty-three".