308921421249 has 135 divisors (see below), whose sum is σ = 552173322753. Its totient is φ = 166395276432.

The previous prime is 308921421239. The next prime is 308921421269. The reversal of 308921421249 is 942124129803.

The square root of 308921421249 is 555807.

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

308921421249 is a `hidden beast` number, since 308 + 9 + 214 + 2 + 124 + 9 = 666.

It is not a de Polignac number, because 308921421249 - 2⁷ = 308921421121 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (308921421239) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 1552368852 + ... + 1552369050.

Almost surely, 2^308921421249 is an apocalyptic number.

308921421249 is the 555807-th square number.

308921421249 is the 277904-th centered octagonal number.

It is an amenable number.

308921421249 is a deficient number, since it is larger than the sum of its proper divisors (243251901504).

308921421249 is an frugal number, since it uses more digits than its factorization.

308921421249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 308921421249 in words is "three hundred eight billion, nine hundred twenty-one million, four hundred twenty-one thousand, two hundred forty-nine".