1012399089 has 8 divisors (see below), whose sum is σ = 1453701312. Its totient is φ = 623014800.

The previous prime is 1012399067. The next prime is 1012399103. The reversal of 1012399089 is 9809932101.

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

It is not a de Polignac number, because 1012399089 - 2²¹ = 1010301937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012399089.

It is not an unprimeable number, because it can be changed into a prime (1012399039) 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, 12979437 + ... + 12979514.

It is an arithmetic number, because the mean of its divisors is an integer number (181712664).

Almost surely, 2^1012399089 is an apocalyptic number.

It is an amenable number.

1012399089 is a deficient number, since it is larger than the sum of its proper divisors (441302223).

1012399089 is a wasteful number, since it uses less digits than its factorization.

1012399089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25958967.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 1012399089 is about 31818.2194504972. The cubic root of 1012399089 is about 1004.1160644355.

The spelling of 1012399089 in words is "one billion, twelve million, three hundred ninety-nine thousand, eighty-nine".