1673564121 has 6 divisors (see below), whose sum is σ = 2417370410. Its totient is φ = 1115709408.

The previous prime is 1673564107. The next prime is 1673564129. The reversal of 1673564121 is 1214653761.

1673564121 is a `hidden beast` number, since 1 + 6 + 7 + 3 + 5 + 641 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1409176521 + 264387600 = 37539^2 + 16260^2 .

It is not a de Polignac number, because 1673564121 - 2⁵ = 1673564089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1673564129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92975776 + ... + 92975793.

Almost surely, 2^1673564121 is an apocalyptic number.

It is an amenable number.

1673564121 is a deficient number, since it is larger than the sum of its proper divisors (743806289).

1673564121 is a wasteful number, since it uses less digits than its factorization.

1673564121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185951575 (or 185951572 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 1673564121 is about 40909.2180443479. The cubic root of 1673564121 is about 1187.2644176955.

The spelling of 1673564121 in words is "one billion, six hundred seventy-three million, five hundred sixty-four thousand, one hundred twenty-one".