100868391 has 12 divisors (see below), whose sum is σ = 156906568. Its totient is φ = 62072784.

The previous prime is 100868371. The next prime is 100868393. The reversal of 100868391 is 193868001.

It is not a de Polignac number, because 100868391 - 2¹⁰ = 100867367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100868393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430945 + ... + 431178.

Almost surely, 2^100868391 is an apocalyptic number.

100868391 is a deficient number, since it is larger than the sum of its proper divisors (56038177).

100868391 is a wasteful number, since it uses less digits than its factorization.

100868391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862142 (or 862139 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 100868391 is about 10043.3256942111. The cubic root of 100868391 is about 465.4985841883.

The spelling of 100868391 in words is "one hundred million, eight hundred sixty-eight thousand, three hundred ninety-one".