721598049 has 12 divisors (see below), whose sum is σ = 1052050896. Its totient is φ = 476568792.

The previous prime is 721598047. The next prime is 721598057. The reversal of 721598049 is 940895127.

It is not a de Polignac number, because 721598049 - 2¹ = 721598047 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 721597995 and 721598013.

It is not an unprimeable number, because it can be changed into a prime (721598041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 373699 + ... + 375624.

It is an arithmetic number, because the mean of its divisors is an integer number (87670908).

Almost surely, 2^721598049 is an apocalyptic number.

It is an amenable number.

721598049 is a deficient number, since it is larger than the sum of its proper divisors (330452847).

721598049 is a wasteful number, since it uses less digits than its factorization.

721598049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749436 (or 749433 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 721598049 is about 26862.5771101732. The cubic root of 721598049 is about 896.9435615844.

It can be divided in two parts, 72159 and 8049, that added together give a palindrome (80208).

The spelling of 721598049 in words is "seven hundred twenty-one million, five hundred ninety-eight thousand, forty-nine".