100423919 has 2 divisors, whose sum is σ = 100423920. Its totient is φ = 100423918.

The previous prime is 100423907. The next prime is 100423927. The reversal of 100423919 is 919324001.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (919324001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100423919 - 2⁴ = 100423903 is a prime.

It is a super-2 number, since 2×100423919² = 20169927014637122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100423891 and 100423900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100423969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50211959 + 50211960.

It is an arithmetic number, because the mean of its divisors is an integer number (50211960).

Almost surely, 2^100423919 is an apocalyptic number.

100423919 is a deficient number, since it is larger than the sum of its proper divisors (1).

100423919 is an equidigital number, since it uses as much as digits as its factorization.

100423919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 100423919 is about 10021.1735340727. The cubic root of 100423919 is about 464.8138446285.

The spelling of 100423919 in words is "one hundred million, four hundred twenty-three thousand, nine hundred nineteen".