721956034 has 16 divisors (see below), whose sum is σ = 1206986400. Its totient is φ = 321862464.

The previous prime is 721956031. The next prime is 721956041. The reversal of 721956034 is 430659127.

It is a junction number, because it is equal to n+sod(n) for n = 721955984 and 721956002.

It is not an unprimeable number, because it can be changed into a prime (721956031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558144 + ... + 559435.

It is an arithmetic number, because the mean of its divisors is an integer number (75436650).

Almost surely, 2^721956034 is an apocalyptic number.

721956034 is a deficient number, since it is larger than the sum of its proper divisors (485030366).

721956034 is a wasteful number, since it uses less digits than its factorization.

721956034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117617.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 721956034 is about 26869.2395500878. The cubic root of 721956034 is about 897.0918617163.

The spelling of 721956034 in words is "seven hundred twenty-one million, nine hundred fifty-six thousand, thirty-four".