1021472889 has 8 divisors (see below), whose sum is σ = 1433646240. Its totient is φ = 645140736.

The previous prime is 1021472861. The next prime is 1021472891. The reversal of 1021472889 is 9882741201.

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

It is not a de Polignac number, because 1021472889 - 2²⁰ = 1020424313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021472889.

It is not an unprimeable number, because it can be changed into a prime (1021472189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8960232 + ... + 8960345.

It is an arithmetic number, because the mean of its divisors is an integer number (179205780).

Almost surely, 2^1021472889 is an apocalyptic number.

1021472889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1021472889 is a deficient number, since it is larger than the sum of its proper divisors (412173351).

1021472889 is a wasteful number, since it uses less digits than its factorization.

1021472889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17920599.

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 1021472889 is about 31960.4894987546. The cubic root of 1021472889 is about 1007.1070005529.

The spelling of 1021472889 in words is "one billion, twenty-one million, four hundred seventy-two thousand, eight hundred eighty-nine".