1020617617 has 4 divisors (see below), whose sum is σ = 1064992320. Its totient is φ = 976242916.

The previous prime is 1020617597. The next prime is 1020617659. The reversal of 1020617617 is 7167160201.

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 an emirpimes, since its reverse is a distinct semiprime: 7167160201 = 6277 ⋅1141813.

It is a cyclic number.

It is not a de Polignac number, because 1020617617 - 2⁷ = 1020617489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020617417) 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, 22187317 + ... + 22187362.

It is an arithmetic number, because the mean of its divisors is an integer number (266248080).

Almost surely, 2^1020617617 is an apocalyptic number.

It is an amenable number.

1020617617 is a deficient number, since it is larger than the sum of its proper divisors (44374703).

1020617617 is an equidigital number, since it uses as much as digits as its factorization.

1020617617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44374702.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 1020617617 is about 31947.1065512982. The cubic root of 1020617617 is about 1006.8258408861.

Adding to 1020617617 its reverse (7167160201), we get a palindrome (8187777818).

The spelling of 1020617617 in words is "one billion, twenty million, six hundred seventeen thousand, six hundred seventeen".