126981693 has 24 divisors (see below), whose sum is σ = 196728480. Its totient is φ = 78680160.

The previous prime is 126981671. The next prime is 126981697. The reversal of 126981693 is 396189621.

It is a happy number.

It is not a de Polignac number, because 126981693 - 2¹⁴ = 126965309 is a prime.

It is a super-2 number, since 2×126981693² = 32248700714292498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126981697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2058 + ... + 16068.

It is an arithmetic number, because the mean of its divisors is an integer number (8197020).

Almost surely, 2^126981693 is an apocalyptic number.

It is an amenable number.

126981693 is a deficient number, since it is larger than the sum of its proper divisors (69746787).

126981693 is a wasteful number, since it uses less digits than its factorization.

126981693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14089 (or 14086 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 126981693 is about 11268.6153985306. The cubic root of 126981693 is about 502.6284159807.

The spelling of 126981693 in words is "one hundred twenty-six million, nine hundred eighty-one thousand, six hundred ninety-three".