1672918639 has 8 divisors (see below), whose sum is σ = 1995033600. Its totient is φ = 1371585336.

The previous prime is 1672918633. The next prime is 1672918649. The reversal of 1672918639 is 9368192761.

It is a happy number.

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 1672918639 - 2¹⁵ = 1672885871 is a prime.

It is a super-2 number, since 2×1672918639² = 5597313545427224642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672918633) 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, 5195239 + ... + 5195560.

It is an arithmetic number, because the mean of its divisors is an integer number (249379200).

Almost surely, 2^1672918639 is an apocalyptic number.

1672918639 is a deficient number, since it is larger than the sum of its proper divisors (322114961).

1672918639 is a wasteful number, since it uses less digits than its factorization.

1672918639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10390829.

The product of its digits is 979776, while the sum is 52.

The square root of 1672918639 is about 40901.3280835721. The cubic root of 1672918639 is about 1187.1117582010. Note that the first 3 decimals are identical.

The spelling of 1672918639 in words is "one billion, six hundred seventy-two million, nine hundred eighteen thousand, six hundred thirty-nine".