73703621 has 2 divisors, whose sum is σ = 73703622. Its totient is φ = 73703620.

The previous prime is 73703573. The next prime is 73703627. The reversal of 73703621 is 12630737.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41088100 + 32615521 = 6410^2 + 5711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73703621 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 (73703627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36851810 + 36851811.

It is an arithmetic number, because the mean of its divisors is an integer number (36851811).

Almost surely, 2^73703621 is an apocalyptic number.

It is an amenable number.

73703621 is a deficient number, since it is larger than the sum of its proper divisors (1).

73703621 is an equidigital number, since it uses as much as digits as its factorization.

73703621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 73703621 is about 8585.0813042161. The cubic root of 73703621 is about 419.2724004911.

The spelling of 73703621 in words is "seventy-three million, seven hundred three thousand, six hundred twenty-one".