749910221 has 8 divisors (see below), whose sum is σ = 790042080. Its totient is φ = 709844688.

The previous prime is 749910211. The next prime is 749910223. The reversal of 749910221 is 122019947.

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 749910221 - 2⁶ = 749910157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749910223) 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, 7550 + ... + 39456.

It is an arithmetic number, because the mean of its divisors is an integer number (98755260).

Almost surely, 2^749910221 is an apocalyptic number.

It is an amenable number.

749910221 is a deficient number, since it is larger than the sum of its proper divisors (40131859).

749910221 is a wasteful number, since it uses less digits than its factorization.

749910221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33163.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 749910221 is about 27384.4886934191. The cubic root of 749910221 is about 908.5240417984.

The spelling of 749910221 in words is "seven hundred forty-nine million, nine hundred ten thousand, two hundred twenty-one".