722631009 has 16 divisors (see below), whose sum is σ = 1014836480. Its totient is φ = 456120720.

The previous prime is 722631001. The next prime is 722631059. The reversal of 722631009 is 900136227.

It is not a de Polignac number, because 722631009 - 2³ = 722631001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722631001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132474 + ... + 137820.

It is an arithmetic number, because the mean of its divisors is an integer number (63427280).

Almost surely, 2^722631009 is an apocalyptic number.

It is an amenable number.

722631009 is a deficient number, since it is larger than the sum of its proper divisors (292205471).

722631009 is a wasteful number, since it uses less digits than its factorization.

722631009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7740.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 722631009 is about 26881.7969823448. The cubic root of 722631009 is about 897.3713459439.

The spelling of 722631009 in words is "seven hundred twenty-two million, six hundred thirty-one thousand, nine".