100991276 has 6 divisors (see below), whose sum is σ = 176734740. Its totient is φ = 50495636.

The previous prime is 100991257. The next prime is 100991299. The reversal of 100991276 is 672199001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12623906 + ... + 12623913.

It is an arithmetic number, because the mean of its divisors is an integer number (29455790).

Almost surely, 2^100991276 is an apocalyptic number.

It is an amenable number.

100991276 is a deficient number, since it is larger than the sum of its proper divisors (75743464).

100991276 is a wasteful number, since it uses less digits than its factorization.

100991276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25247823 (or 25247821 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 100991276 is about 10049.4415765255. The cubic root of 100991276 is about 465.6875418956.

The spelling of 100991276 in words is "one hundred million, nine hundred ninety-one thousand, two hundred seventy-six".