1609122061 has 4 divisors (see below), whose sum is σ = 1631785824. Its totient is φ = 1586458300.

The previous prime is 1609122041. The next prime is 1609122071. The reversal of 1609122061 is 1602219061.

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 1609122061 - 2¹⁹ = 1608597773 is a prime.

It is a super-3 number, since 3×1609122061³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609122041) 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, 11331775 + ... + 11331916.

It is an arithmetic number, because the mean of its divisors is an integer number (407946456).

Almost surely, 2^1609122061 is an apocalyptic number.

It is an amenable number.

1609122061 is a deficient number, since it is larger than the sum of its proper divisors (22663763).

1609122061 is an equidigital number, since it uses as much as digits as its factorization.

1609122061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22663762.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1609122061 is about 40113.8637007207. The cubic root of 1609122061 is about 1171.8256401050.

The spelling of 1609122061 in words is "one billion, six hundred nine million, one hundred twenty-two thousand, sixty-one".