308845836121 has 3 divisors (see below), whose sum is σ = 308846391861. Its totient is φ = 308845280382.

The previous prime is 308845836059. The next prime is 308845836139. The reversal of 308845836121 is 121638548803.

It is a happy number.

The square root of 308845836121 is 555739.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 121638548803 = 137 ⋅887872619.

It is not a de Polignac number, because 308845836121 - 2¹³ = 308845827929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (308845836421) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 277870 + ... + 833608.

It is an arithmetic number, because the mean of its divisors is an integer number (102948797287).

Almost surely, 2^308845836121 is an apocalyptic number.

308845836121 is the 555739-th square number.

308845836121 is the 277870-th centered octagonal number.

It is an amenable number.

308845836121 is a deficient number, since it is larger than the sum of its proper divisors (555740).

308845836121 is an frugal number, since it uses more digits than its factorization.

308845836121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111478 (or 555739 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 49.

Multiplying 308845836121 by its sum of digits (49), we get a square (15133445969929 = 3890173²).

The spelling of 308845836121 in words is "three hundred eight billion, eight hundred forty-five million, eight hundred thirty-six thousand, one hundred twenty-one".