12281903397 has 40 divisors (see below), whose sum is σ = 18646886016. Its totient is φ = 8054468928.

The previous prime is 12281903357. The next prime is 12281903399. The reversal of 12281903397 is 79330918221.

12281903397 is a `hidden beast` number, since 1 + 228 + 1 + 90 + 339 + 7 = 666.

It is not a de Polignac number, because 12281903397 - 2⁸ = 12281903141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12281903399) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5952388 + ... + 5954450.

Almost surely, 2^12281903397 is an apocalyptic number.

It is an amenable number.

12281903397 is a deficient number, since it is larger than the sum of its proper divisors (6364982619).

12281903397 is a wasteful number, since it uses less digits than its factorization.

12281903397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239 (or 3230 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 12281903397 in words is "twelve billion, two hundred eighty-one million, nine hundred three thousand, three hundred ninety-seven".