1017398653 has 4 divisors (see below), whose sum is σ = 1036594908. Its totient is φ = 998202400.

The previous prime is 1017398639. The next prime is 1017398663. The reversal of 1017398653 is 3568937101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 785232484 + 232166169 = 28022^2 + 15237^2 .

It is a cyclic number.

It is not a de Polignac number, because 1017398653 - 2⁹ = 1017398141 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 (1017398623) 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, 9598048 + ... + 9598153.

It is an arithmetic number, because the mean of its divisors is an integer number (259148727).

Almost surely, 2^1017398653 is an apocalyptic number.

It is an amenable number.

1017398653 is a deficient number, since it is larger than the sum of its proper divisors (19196255).

1017398653 is an equidigital number, since it uses as much as digits as its factorization.

1017398653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19196254.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1017398653 is about 31896.6871790786. The cubic root of 1017398653 is about 1005.7662375958.

The spelling of 1017398653 in words is "one billion, seventeen million, three hundred ninety-eight thousand, six hundred fifty-three".