1047121919 has 8 divisors (see below), whose sum is σ = 1135759968. Its totient is φ = 961488640.

The previous prime is 1047121909. The next prime is 1047121931. The reversal of 1047121919 is 9191217401.

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 1047121919 - 2¹² = 1047117823 is a prime.

It is a super-3 number, since 3×1047121919³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047121909) 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 7 ways as a sum of consecutive naturals, for example, 750467 + ... + 751860.

It is an arithmetic number, because the mean of its divisors is an integer number (141969996).

Almost surely, 2^1047121919 is an apocalyptic number.

1047121919 is a deficient number, since it is larger than the sum of its proper divisors (88638049).

1047121919 is a wasteful number, since it uses less digits than its factorization.

1047121919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502385.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 1047121919 is about 32359.2632641721. The cubic root of 1047121919 is about 1015.4668495539.

The spelling of 1047121919 in words is "one billion, forty-seven million, one hundred twenty-one thousand, nine hundred nineteen".