722912487 has 16 divisors (see below), whose sum is σ = 1064181888. Its totient is φ = 432848480.

The previous prime is 722912459. The next prime is 722912497. The reversal of 722912487 is 784219227.

It is a cyclic number.

It is not a de Polignac number, because 722912487 - 2⁶ = 722912423 is a prime.

It is a super-3 number, since 3×722912487³ (a number of 28 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722912417) 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, 129228 + ... + 134705.

It is an arithmetic number, because the mean of its divisors is an integer number (66511368).

Almost surely, 2^722912487 is an apocalyptic number.

722912487 is a deficient number, since it is larger than the sum of its proper divisors (341269401).

722912487 is a wasteful number, since it uses less digits than its factorization.

722912487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264030.

The product of its digits is 112896, while the sum is 42.

The square root of 722912487 is about 26887.0319485063. The cubic root of 722912487 is about 897.4878450052.

The spelling of 722912487 in words is "seven hundred twenty-two million, nine hundred twelve thousand, four hundred eighty-seven".