424336290921 has 15 divisors (see below), whose sum is σ = 633893834541. Its totient is φ = 282886952148.

The previous prime is 424336290907. The next prime is 424336290923. The reversal of 424336290921 is 129092633424.

The square root of 424336290921 is 651411.

It is a perfect power (a square), and thus also a powerful number.

424336290921 is a `hidden beast` number, since 4 + 2 + 4 + 336 + 290 + 9 + 21 = 666.

It is not a de Polignac number, because 424336290921 - 2²⁵ = 424302736489 is a prime.

It is a super-2 number, since 2×424336290921² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (424336290923) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 5826510 + ... + 5898888.

Almost surely, 2^424336290921 is an apocalyptic number.

424336290921 is the 651411-st square number.

424336290921 is the 325706-th centered octagonal number.

It is an amenable number.

424336290921 is a deficient number, since it is larger than the sum of its proper divisors (209557543620).

424336290921 is an frugal number, since it uses more digits than its factorization.

424336290921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144770 (or 72382 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 424336290921 in words is "four hundred twenty-four billion, three hundred thirty-six million, two hundred ninety thousand, nine hundred twenty-one".