1672969399 has 4 divisors (see below), whose sum is σ = 1761020440. Its totient is φ = 1584918360.

The previous prime is 1672969391. The next prime is 1672969409. The reversal of 1672969399 is 9939692761.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1672969399 - 2³ = 1672969391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672969391) 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, 44025492 + ... + 44025529.

It is an arithmetic number, because the mean of its divisors is an integer number (440255110).

Almost surely, 2^1672969399 is an apocalyptic number.

1672969399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1672969399 is a deficient number, since it is larger than the sum of its proper divisors (88051041).

1672969399 is an equidigital number, since it uses as much as digits as its factorization.

1672969399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88051040.

The product of its digits is 9920232, while the sum is 61.

The square root of 1672969399 is about 40901.9485966133. The cubic root of 1672969399 is about 1187.1237645995.

The spelling of 1672969399 in words is "one billion, six hundred seventy-two million, nine hundred sixty-nine thousand, three hundred ninety-nine".