100939491 has 12 divisors (see below), whose sum is σ = 145892760. Its totient is φ = 67250880.

The previous prime is 100939483. The next prime is 100939513. The reversal of 100939491 is 194939001.

It is not a de Polignac number, because 100939491 - 2³ = 100939483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100939411) 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, 19851 + ... + 24411.

It is an arithmetic number, because the mean of its divisors is an integer number (12157730).

Almost surely, 2^100939491 is an apocalyptic number.

100939491 is a deficient number, since it is larger than the sum of its proper divisors (44953269).

100939491 is a wasteful number, since it uses less digits than its factorization.

100939491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7026 (or 7023 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 100939491 is about 10046.8647348315. The cubic root of 100939491 is about 465.6079318759.

The spelling of 100939491 in words is "one hundred million, nine hundred thirty-nine thousand, four hundred ninety-one".