100990231 has 2 divisors, whose sum is σ = 100990232. Its totient is φ = 100990230.

The previous prime is 100990229. The next prime is 100990249. The reversal of 100990231 is 132099001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100990231 - 2¹ = 100990229 is a prime.

It is a super-2 number, since 2×100990231² = 20398053514866722, which contains 22 as substring.

Together with 100990229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 100990196 and 100990205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100990271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50495115 + 50495116.

It is an arithmetic number, because the mean of its divisors is an integer number (50495116).

Almost surely, 2^100990231 is an apocalyptic number.

100990231 is a deficient number, since it is larger than the sum of its proper divisors (1).

100990231 is an equidigital number, since it uses as much as digits as its factorization.

100990231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 100990231 is about 10049.3895834523. The cubic root of 100990231 is about 465.6859356673.

The spelling of 100990231 in words is "one hundred million, nine hundred ninety thousand, two hundred thirty-one".