929920799421 has 12 divisors (see below), whose sum is σ = 1343228962140. Its totient is φ = 619942570560.

The previous prime is 929920799317. The next prime is 929920799443. The reversal of 929920799421 is 124997029929.

929920799421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 696231704025 + 233689095396 = 834405^2 + 483414^2 .

It is not a de Polignac number, because 929920799421 - 2⁷ = 929920799293 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (929920794421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1252891 + ... + 1851911.

It is an arithmetic number, because the mean of its divisors is an integer number (111935746845).

Almost surely, 2^929920799421 is an apocalyptic number.

It is an amenable number.

929920799421 is a deficient number, since it is larger than the sum of its proper divisors (413308162719).

929920799421 is a wasteful number, since it uses less digits than its factorization.

929920799421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771516 (or 771513 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 63.

The spelling of 929920799421 in words is "nine hundred twenty-nine billion, nine hundred twenty million, seven hundred ninety-nine thousand, four hundred twenty-one".