1011421609 has 4 divisors (see below), whose sum is σ = 1103369040. Its totient is φ = 919474180.

The previous prime is 1011421589. The next prime is 1011421651. The reversal of 1011421609 is 9061241101.

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.

It is a cyclic number.

It is not a de Polignac number, because 1011421609 - 2⁵ = 1011421577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011421669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45973699 + ... + 45973720.

It is an arithmetic number, because the mean of its divisors is an integer number (275842260).

Almost surely, 2^1011421609 is an apocalyptic number.

It is an amenable number.

1011421609 is a deficient number, since it is larger than the sum of its proper divisors (91947431).

1011421609 is an equidigital number, since it uses as much as digits as its factorization.

1011421609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91947430.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1011421609 is about 31802.8553592284. The cubic root of 1011421609 is about 1003.7927994852.

The spelling of 1011421609 in words is "one billion, eleven million, four hundred twenty-one thousand, six hundred nine".