722105669 has 4 divisors (see below), whose sum is σ = 722162496. Its totient is φ = 722048844.

The previous prime is 722105663. The next prime is 722105693. The reversal of 722105669 is 966501227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 966501227 = 293 ⋅3298639.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722105669 is a prime.

It is a super-2 number, since 2×722105669² = 1042873194403875122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722105663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362 + ... + 38004.

It is an arithmetic number, because the mean of its divisors is an integer number (180540624).

Almost surely, 2^722105669 is an apocalyptic number.

It is an amenable number.

722105669 is a deficient number, since it is larger than the sum of its proper divisors (56827).

722105669 is a wasteful number, since it uses less digits than its factorization.

722105669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56826.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 722105669 is about 26872.0239096351. The cubic root of 722105669 is about 897.1538355122.

The spelling of 722105669 in words is "seven hundred twenty-two million, one hundred five thousand, six hundred sixty-nine".