126981908 has 24 divisors (see below), whose sum is σ = 235651752. Its totient is φ = 59664384.

The previous prime is 126981893. The next prime is 126981913. The reversal of 126981908 is 809189621.

It can be written as a sum of positive squares in 4 ways, for example, as 22165264 + 104816644 = 4708^2 + 10238^2 .

It is a super-2 number, since 2×126981908² = 32248809918640928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66860 + ... + 68732.

It is an arithmetic number, because the mean of its divisors is an integer number (9818823).

Almost surely, 2^126981908 is an apocalyptic number.

It is an amenable number.

126981908 is a deficient number, since it is larger than the sum of its proper divisors (108669844).

126981908 is a wasteful number, since it uses less digits than its factorization.

126981908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891 (or 2889 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 126981908 is about 11268.6249382966. The cubic root of 126981908 is about 502.6286996569.

The spelling of 126981908 in words is "one hundred twenty-six million, nine hundred eighty-one thousand, nine hundred eight".