1022491789 has 8 divisors (see below), whose sum is σ = 1122933600. Its totient is φ = 923298000.

The previous prime is 1022491759. The next prime is 1022491793. The reversal of 1022491789 is 9871942201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1022491789 - 2⁹ = 1022491277 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 (1022491709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310287 + ... + 313564.

It is an arithmetic number, because the mean of its divisors is an integer number (140366700).

Almost surely, 2^1022491789 is an apocalyptic number.

It is an amenable number.

1022491789 is a deficient number, since it is larger than the sum of its proper divisors (100441811).

1022491789 is a wasteful number, since it uses less digits than its factorization.

1022491789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624011.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 1022491789 is about 31976.4255194354. The cubic root of 1022491789 is about 1007.4417460422.

The spelling of 1022491789 in words is "one billion, twenty-two million, four hundred ninety-one thousand, seven hundred eighty-nine".