1011020309 has 8 divisors (see below), whose sum is σ = 1089268320. Its totient is φ = 932840496.

The previous prime is 1011020299. The next prime is 1011020321. The reversal of 1011020309 is 9030201101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011020309 - 2⁸ = 1011020053 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 (1011020399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16154 + ... + 47780.

It is an arithmetic number, because the mean of its divisors is an integer number (136158540).

Almost surely, 2^1011020309 is an apocalyptic number.

It is an amenable number.

1011020309 is a deficient number, since it is larger than the sum of its proper divisors (78248011).

1011020309 is a wasteful number, since it uses less digits than its factorization.

1011020309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34099.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1011020309 is about 31796.5455513645. The cubic root of 1011020309 is about 1003.6600242131.

The spelling of 1011020309 in words is "one billion, eleven million, twenty thousand, three hundred nine".