73963921 has 4 divisors (see below), whose sum is σ = 74088000. Its totient is φ = 73839844.

The previous prime is 73963849. The next prime is 73963933. The reversal of 73963921 is 12936937.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73963921 - 2⁷ = 73963793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73963951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61141 + ... + 62338.

It is an arithmetic number, because the mean of its divisors is an integer number (18522000).

Almost surely, 2^73963921 is an apocalyptic number.

It is an amenable number.

73963921 is a deficient number, since it is larger than the sum of its proper divisors (124079).

73963921 is a wasteful number, since it uses less digits than its factorization.

73963921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124078.

The product of its digits is 61236, while the sum is 40.

The square root of 73963921 is about 8600.2279620950. The cubic root of 73963921 is about 419.7654037572.

The spelling of 73963921 in words is "seventy-three million, nine hundred sixty-three thousand, nine hundred twenty-one".