734705221 has 2 divisors, whose sum is σ = 734705222. Its totient is φ = 734705220.

The previous prime is 734705219. The next prime is 734705291. The reversal of 734705221 is 122507437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 705964900 + 28740321 = 26570^2 + 5361^2 .

It is a cyclic number.

It is not a de Polignac number, because 734705221 - 2¹ = 734705219 is a prime.

Together with 734705219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (734705291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 367352610 + 367352611.

It is an arithmetic number, because the mean of its divisors is an integer number (367352611).

Almost surely, 2^734705221 is an apocalyptic number.

It is an amenable number.

734705221 is a deficient number, since it is larger than the sum of its proper divisors (1).

734705221 is an equidigital number, since it uses as much as digits as its factorization.

734705221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 734705221 is about 27105.4463346391. The cubic root of 734705221 is about 902.3417292919.

The spelling of 734705221 in words is "seven hundred thirty-four million, seven hundred five thousand, two hundred twenty-one".