1030405309 has 4 divisors (see below), whose sum is σ = 1091017404. Its totient is φ = 969793216.

The previous prime is 1030405301. The next prime is 1030405319. The reversal of 1030405309 is 9035040301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 632522500 + 397882809 = 25150^2 + 19947^2 .

It is a cyclic number.

It is not a de Polignac number, because 1030405309 - 2³ = 1030405301 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 (1030405301) 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, 30306022 + ... + 30306055.

It is an arithmetic number, because the mean of its divisors is an integer number (272754351).

Almost surely, 2^1030405309 is an apocalyptic number.

It is an amenable number.

1030405309 is a deficient number, since it is larger than the sum of its proper divisors (60612095).

1030405309 is an equidigital number, since it uses as much as digits as its factorization.

1030405309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60612094.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1030405309 is about 32099.9269313810. The cubic root of 1030405309 is about 1010.0340834167.

The spelling of 1030405309 in words is "one billion, thirty million, four hundred five thousand, three hundred nine".