1138245999 has 32 divisors (see below), whose sum is σ = 1755737856. Its totient is φ = 648261120.

The previous prime is 1138245961. The next prime is 1138246001. The reversal of 1138245999 is 9995428311.

It is not a de Polignac number, because 1138245999 - 2¹⁵ = 1138213231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138245499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 507709 + ... + 509945.

It is an arithmetic number, because the mean of its divisors is an integer number (54866808).

Almost surely, 2^1138245999 is an apocalyptic number.

1138245999 is a deficient number, since it is larger than the sum of its proper divisors (617491857).

1138245999 is a wasteful number, since it uses less digits than its factorization.

1138245999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3175.

The product of its digits is 699840, while the sum is 51.

The square root of 1138245999 is about 33737.9015203969. The cubic root of 1138245999 is about 1044.1078896809.

The spelling of 1138245999 in words is "one billion, one hundred thirty-eight million, two hundred forty-five thousand, nine hundred ninety-nine".