999410529421 has 4 divisors (see below), whose sum is σ = 1033872961500. Its totient is φ = 964948097344.

The previous prime is 999410529409. The next prime is 999410529427. The reversal of 999410529421 is 124925014999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 734740408900 + 264670120521 = 857170^2 + 514461^2 .

It is a cyclic number.

It is not a de Polignac number, because 999410529421 - 2⁵ = 999410529389 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 (999410529427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17231215996 + ... + 17231216053.

It is an arithmetic number, because the mean of its divisors is an integer number (258468240375).

Almost surely, 2^999410529421 is an apocalyptic number.

It is an amenable number.

999410529421 is a deficient number, since it is larger than the sum of its proper divisors (34462432079).

999410529421 is a wasteful number, since it uses less digits than its factorization.

999410529421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34462432078.

The product of its (nonzero) digits is 2099520, while the sum is 55.

The spelling of 999410529421 in words is "nine hundred ninety-nine billion, four hundred ten million, five hundred twenty-nine thousand, four hundred twenty-one".