1671611003 has 4 divisors (see below), whose sum is σ = 1769941080. Its totient is φ = 1573280928.

The previous prime is 1671610981. The next prime is 1671611027. The reversal of 1671611003 is 3001161761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3001161761 = 13 ⋅230858597.

It is a cyclic number.

It is not a de Polignac number, because 1671611003 - 2¹² = 1671606907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1671611093) 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, 49165013 + ... + 49165046.

It is an arithmetic number, because the mean of its divisors is an integer number (442485270).

Almost surely, 2^1671611003 is an apocalyptic number.

1671611003 is a deficient number, since it is larger than the sum of its proper divisors (98330077).

1671611003 is an equidigital number, since it uses as much as digits as its factorization.

1671611003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98330076.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1671611003 is about 40885.3397075284. The cubic root of 1671611003 is about 1186.8023758109.

Adding to 1671611003 its reverse (3001161761), we get a palindrome (4672772764).

The spelling of 1671611003 in words is "one billion, six hundred seventy-one million, six hundred eleven thousand, three".