100380031 has 2 divisors, whose sum is σ = 100380032. Its totient is φ = 100380030.

The previous prime is 100380029. The next prime is 100380041. The reversal of 100380031 is 130083001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100380031 - 2¹ = 100380029 is a prime.

It is a super-2 number, since 2×100380031² = 20152301247121922, which contains 22 as substring.

Together with 100380029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 100379987 and 100380014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100380011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50190015 + 50190016.

It is an arithmetic number, because the mean of its divisors is an integer number (50190016).

Almost surely, 2^100380031 is an apocalyptic number.

100380031 is a deficient number, since it is larger than the sum of its proper divisors (1).

100380031 is an equidigital number, since it uses as much as digits as its factorization.

100380031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 100380031 is about 10018.9835312770. The cubic root of 100380031 is about 464.7461226399.

The spelling of 100380031 in words is "one hundred million, three hundred eighty thousand, thirty-one".