722750091 has 32 divisors (see below), whose sum is σ = 1177279488. Its totient is φ = 385397760.

The previous prime is 722750081. The next prime is 722750111. The reversal of 722750091 is 190057227.

It is not a de Polignac number, because 722750091 - 2⁹ = 722749579 is a prime.

It is a super-3 number, since 3×722750091³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (722750071) 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 31 ways as a sum of consecutive naturals, for example, 1555 + ... + 38051.

It is an arithmetic number, because the mean of its divisors is an integer number (36789984).

Almost surely, 2^722750091 is an apocalyptic number.

722750091 is a deficient number, since it is larger than the sum of its proper divisors (454529397).

722750091 is a wasteful number, since it uses less digits than its factorization.

722750091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36571.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 722750091 is about 26884.0118099959. The cubic root of 722750091 is about 897.4206356939.

The spelling of 722750091 in words is "seven hundred twenty-two million, seven hundred fifty thousand, ninety-one".