1611790121 has 8 divisors (see below), whose sum is σ = 1714114080. Its totient is φ = 1511215488.

The previous prime is 1611790051. The next prime is 1611790127. The reversal of 1611790121 is 1210971161.

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 1611790121 - 2¹⁰ = 1611789097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1611790127) 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, 435431 + ... + 439116.

It is an arithmetic number, because the mean of its divisors is an integer number (214264260).

Almost surely, 2^1611790121 is an apocalyptic number.

It is an amenable number.

1611790121 is a deficient number, since it is larger than the sum of its proper divisors (102323959).

1611790121 is an equidigital number, since it uses as much as digits as its factorization.

1611790121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874663.

The product of its (nonzero) digits is 756, while the sum is 29.

The square root of 1611790121 is about 40147.1060102718. The cubic root of 1611790121 is about 1172.4729443675.

The spelling of 1611790121 in words is "one billion, six hundred eleven million, seven hundred ninety thousand, one hundred twenty-one".