73885421 has 2 divisors, whose sum is σ = 73885422. Its totient is φ = 73885420.

The previous prime is 73885391. The next prime is 73885429. The reversal of 73885421 is 12458837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53509225 + 20376196 = 7315^2 + 4514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73885421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73885429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36942710 + 36942711.

It is an arithmetic number, because the mean of its divisors is an integer number (36942711).

Almost surely, 2^73885421 is an apocalyptic number.

It is an amenable number.

73885421 is a deficient number, since it is larger than the sum of its proper divisors (1).

73885421 is an equidigital number, since it uses as much as digits as its factorization.

73885421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 38.

The square root of 73885421 is about 8595.6629180070. The cubic root of 73885421 is about 419.6168482267.

The spelling of 73885421 in words is "seventy-three million, eight hundred eighty-five thousand, four hundred twenty-one".