1038658121389 has 4 divisors (see below), whose sum is σ = 1187037853024. Its totient is φ = 890278389756.

The previous prime is 1038658121387. The next prime is 1038658121399. The reversal of 1038658121389 is 9831218568301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1038658121389 - 2¹ = 1038658121387 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 (1038658121387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74189865807 + ... + 74189865820.

It is an arithmetic number, because the mean of its divisors is an integer number (296759463256).

Almost surely, 2^{1038658121389} is an apocalyptic number.

It is an amenable number.

1038658121389 is a deficient number, since it is larger than the sum of its proper divisors (148379731635).

1038658121389 is an equidigital number, since it uses as much as digits as its factorization.

1038658121389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148379731634.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 1038658121389 in words is "one trillion, thirty-eight billion, six hundred fifty-eight million, one hundred twenty-one thousand, three hundred eighty-nine".