100423139 has 4 divisors (see below), whose sum is σ = 100475424. Its totient is φ = 100370856.

The previous prime is 100423121. The next prime is 100423153. The reversal of 100423139 is 931324001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931324001 = 197 ⋅4727533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100423139 is a prime.

It is a super-2 number, since 2×100423139² = 20169613693226642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100423109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23147 + ... + 27140.

It is an arithmetic number, because the mean of its divisors is an integer number (25118856).

Almost surely, 2^100423139 is an apocalyptic number.

100423139 is a deficient number, since it is larger than the sum of its proper divisors (52285).

100423139 is an equidigital number, since it uses as much as digits as its factorization.

100423139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52284.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 100423139 is about 10021.1346163995. The cubic root of 100423139 is about 464.8126412109.

The spelling of 100423139 in words is "one hundred million, four hundred twenty-three thousand, one hundred thirty-nine".