721449070 has 16 divisors (see below), whose sum is σ = 1303202160. Its totient is φ = 287558784.

The previous prime is 721449067. The next prime is 721449083. The reversal of 721449070 is 70944127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124635 + ... + 130294.

It is an arithmetic number, because the mean of its divisors is an integer number (81450135).

Almost surely, 2^721449070 is an apocalyptic number.

721449070 is a deficient number, since it is larger than the sum of its proper divisors (581753090).

721449070 is a wasteful number, since it uses less digits than its factorization.

721449070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255219.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 721449070 is about 26859.8039829035. The cubic root of 721449070 is about 896.8818305639.

The spelling of 721449070 in words is "seven hundred twenty-one million, four hundred forty-nine thousand, seventy".