1671634499 has 2 divisors, whose sum is σ = 1671634500. Its totient is φ = 1671634498.

The previous prime is 1671634451. The next prime is 1671634511. The reversal of 1671634499 is 9944361761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1671634499 - 2¹² = 1671630403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1671634099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835817249 + 835817250.

It is an arithmetic number, because the mean of its divisors is an integer number (835817250).

Almost surely, 2^1671634499 is an apocalyptic number.

1671634499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671634499 is an equidigital number, since it uses as much as digits as its factorization.

1671634499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 50.

The square root of 1671634499 is about 40885.6270466774. The cubic root of 1671634499 is about 1186.8079363107.

It can be divided in two parts, 16716 and 34499, that added together give a palindrome (51215).

The spelling of 1671634499 in words is "one billion, six hundred seventy-one million, six hundred thirty-four thousand, four hundred ninety-nine".