787223021 has 16 divisors (see below), whose sum is σ = 887147520. Its totient is φ = 693567360.

The previous prime is 787222979. The next prime is 787223033. The reversal of 787223021 is 120322787.

It is a cyclic number.

It is not a de Polignac number, because 787223021 - 2¹⁰ = 787221997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787223321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16040 + ... + 42798.

It is an arithmetic number, because the mean of its divisors is an integer number (55446720).

Almost surely, 2^787223021 is an apocalyptic number.

It is an amenable number.

787223021 is a deficient number, since it is larger than the sum of its proper divisors (99924499).

787223021 is a wasteful number, since it uses less digits than its factorization.

787223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26876.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 787223021 is about 28057.4949166885. The cubic root of 787223021 is about 923.3490965811.

The spelling of 787223021 in words is "seven hundred eighty-seven million, two hundred twenty-three thousand, twenty-one".