1010721617 has 4 divisors (see below), whose sum is σ = 1012536756. Its totient is φ = 1008906480.

The previous prime is 1010721611. The next prime is 1010721623. The reversal of 1010721617 is 7161270101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7161270101 = 89 ⋅80463709.

It is an interprime number because it is at equal distance from previous prime (1010721611) and next prime (1010721623).

It can be written as a sum of positive squares in 2 ways, for example, as 404774161 + 605947456 = 20119^2 + 24616^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010721617 - 2¹⁰ = 1010720593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1010721611) 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, 906734 + ... + 907847.

It is an arithmetic number, because the mean of its divisors is an integer number (253134189).

Almost surely, 2^1010721617 is an apocalyptic number.

It is an amenable number.

1010721617 is a deficient number, since it is larger than the sum of its proper divisors (1815139).

1010721617 is an equidigital number, since it uses as much as digits as its factorization.

1010721617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815138.

The product of its (nonzero) digits is 588, while the sum is 26.

The square root of 1010721617 is about 31791.8482790793. The cubic root of 1010721617 is about 1003.5611753095.

Adding to 1010721617 its reverse (7161270101), we get a palindrome (8171991718).

The spelling of 1010721617 in words is "one billion, ten million, seven hundred twenty-one thousand, six hundred seventeen".