8121969403 has 8 divisors (see below), whose sum is σ = 8385140736. Its totient is φ = 7858871400.

The previous prime is 8121969377. The next prime is 8121969407. The reversal of 8121969403 is 3049691218.

It is a happy number.

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 8121969403 - 2¹⁷ = 8121838331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8121969403.

It is not an unprimeable number, because it can be changed into a prime (8121969407) 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, 288588 + ... + 315478.

It is an arithmetic number, because the mean of its divisors is an integer number (1048142592).

Almost surely, 2^8121969403 is an apocalyptic number.

8121969403 is a deficient number, since it is larger than the sum of its proper divisors (263171333).

8121969403 is a wasteful number, since it uses less digits than its factorization.

8121969403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36665.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 8121969403 is about 90121.9695912157. The cubic root of 8121969403 is about 2010.1128954023.

The spelling of 8121969403 in words is "eight billion, one hundred twenty-one million, nine hundred sixty-nine thousand, four hundred three".