73881949 has 4 divisors (see below), whose sum is σ = 78227964. Its totient is φ = 69535936.

The previous prime is 73881943. The next prime is 73881971. The reversal of 73881949 is 94918837.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65367225 + 8514724 = 8085^2 + 2918^2 .

It is a cyclic number.

It is not a de Polignac number, because 73881949 - 2¹¹ = 73879901 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73881943) 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, 2172982 + ... + 2173015.

It is an arithmetic number, because the mean of its divisors is an integer number (19556991).

Almost surely, 2^73881949 is an apocalyptic number.

It is an amenable number.

73881949 is a deficient number, since it is larger than the sum of its proper divisors (4346015).

73881949 is a wasteful number, since it uses less digits than its factorization.

73881949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4346014.

The product of its digits is 435456, while the sum is 49.

The square root of 73881949 is about 8595.4609533172. The cubic root of 73881949 is about 419.6102752904.

The spelling of 73881949 in words is "seventy-three million, eight hundred eighty-one thousand, nine hundred forty-nine".