1020620217 has 4 divisors (see below), whose sum is σ = 1360826960. Its totient is φ = 680413476.

The previous prime is 1020620201. The next prime is 1020620221. The reversal of 1020620217 is 7120260201.

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: 7120260201 = 3 ⋅2373420067.

It is not a de Polignac number, because 1020620217 - 2⁴ = 1020620201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020620193 and 1020620202.

It is not an unprimeable number, because it can be changed into a prime (1020620297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170103367 + ... + 170103372.

It is an arithmetic number, because the mean of its divisors is an integer number (340206740).

Almost surely, 2^1020620217 is an apocalyptic number.

It is an amenable number.

1020620217 is a deficient number, since it is larger than the sum of its proper divisors (340206743).

1020620217 is an equidigital number, since it uses as much as digits as its factorization.

1020620217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340206742.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1020620217 is about 31947.1472435333. The cubic root of 1020620217 is about 1006.8266958406.

Adding to 1020620217 its reverse (7120260201), we get a palindrome (8140880418).

The spelling of 1020620217 in words is "one billion, twenty million, six hundred twenty thousand, two hundred seventeen".