722486691 has 6 divisors (see below), whose sum is σ = 1043591900. Its totient is φ = 481657788.

The previous prime is 722486663. The next prime is 722486701. The reversal of 722486691 is 196684227.

It is a happy number.

It is not a de Polignac number, because 722486691 - 2⁶ = 722486627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722486291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40138141 + ... + 40138158.

Almost surely, 2^722486691 is an apocalyptic number.

722486691 is a deficient number, since it is larger than the sum of its proper divisors (321105209).

722486691 is a wasteful number, since it uses less digits than its factorization.

722486691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80276305 (or 80276302 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 722486691 is about 26879.1125411536. The cubic root of 722486691 is about 897.3116033927.

The spelling of 722486691 in words is "seven hundred twenty-two million, four hundred eighty-six thousand, six hundred ninety-one".