738660221 has 8 divisors (see below), whose sum is σ = 799647744. Its totient is φ = 678268080.

The previous prime is 738660211. The next prime is 738660253. The reversal of 738660221 is 122066837.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 738660221 - 2¹⁴ = 738643837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (738660211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146261 + ... + 151226.

It is an arithmetic number, because the mean of its divisors is an integer number (99955968).

Almost surely, 2^738660221 is an apocalyptic number.

It is an amenable number.

738660221 is a deficient number, since it is larger than the sum of its proper divisors (60987523).

738660221 is a wasteful number, since it uses less digits than its factorization.

738660221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297691.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 738660221 is about 27178.3042333402. The cubic root of 738660221 is about 903.9579679500.

The spelling of 738660221 in words is "seven hundred thirty-eight million, six hundred sixty thousand, two hundred twenty-one".