1873467981 has 128 divisors (see below), whose sum is σ = 3664281600. Its totient is φ = 917568000.

The previous prime is 1873467977. The next prime is 1873467997. The reversal of 1873467981 is 1897643781.

It is not a de Polignac number, because 1873467981 - 2² = 1873467977 is a prime.

It is a super-2 number, since 2×1873467981² = 7019764551664432722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1873467901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2642055 + ... + 2642763.

It is an arithmetic number, because the mean of its divisors is an integer number (28627200).

Almost surely, 2^1873467981 is an apocalyptic number.

1873467981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1873467981 is a deficient number, since it is larger than the sum of its proper divisors (1790813619).

1873467981 is a wasteful number, since it uses less digits than its factorization.

1873467981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808 (or 802 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 1873467981 is about 43283.5763425344. The cubic root of 1873467981 is about 1232.7700982077.

The spelling of 1873467981 in words is "one billion, eight hundred seventy-three million, four hundred sixty-seven thousand, nine hundred eighty-one".