1671550673 has 4 divisors (see below), whose sum is σ = 1800131508. Its totient is φ = 1542969840.

The previous prime is 1671550589. The next prime is 1671550711. The reversal of 1671550673 is 3760551761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3760551761 = 11779 ⋅319259.

It can be written as a sum of positive squares in 2 ways, for example, as 1114024129 + 557526544 = 33377^2 + 23612^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671550673 - 2¹² = 1671546577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1671550673.

It is not an unprimeable number, because it can be changed into a prime (1671553673) 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, 64290398 + ... + 64290423.

It is an arithmetic number, because the mean of its divisors is an integer number (450032877).

Almost surely, 2^1671550673 is an apocalyptic number.

1671550673 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1671550673 is a deficient number, since it is larger than the sum of its proper divisors (128580835).

1671550673 is a wasteful number, since it uses less digits than its factorization.

1671550673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128580834.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 1671550673 is about 40884.6019058520. The cubic root of 1671550673 is about 1186.7880980376.

The spelling of 1671550673 in words is "one billion, six hundred seventy-one million, five hundred fifty thousand, six hundred seventy-three".