1020730619 has 4 divisors (see below), whose sum is σ = 1023396096. Its totient is φ = 1018065144.

The previous prime is 1020730591. The next prime is 1020730637. The reversal of 1020730619 is 9160370201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9160370201 = 37 ⋅247577573.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020730619 is a prime.

It is a super-2 number, since 2×1020730619² = 2083781993128246322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020730591 and 1020730600.

It is not an unprimeable number, because it can be changed into a prime (1020730649) 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, 1332164 + ... + 1332929.

It is an arithmetic number, because the mean of its divisors is an integer number (255849024).

Almost surely, 2^1020730619 is an apocalyptic number.

1020730619 is a deficient number, since it is larger than the sum of its proper divisors (2665477).

1020730619 is an equidigital number, since it uses as much as digits as its factorization.

1020730619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665476.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 1020730619 is about 31948.8750819180. The cubic root of 1020730619 is about 1006.8629978432.

The spelling of 1020730619 in words is "one billion, twenty million, seven hundred thirty thousand, six hundred nineteen".