423809101 has 2 divisors, whose sum is σ = 423809102. Its totient is φ = 423809100.

The previous prime is 423809083. The next prime is 423809107. The reversal of 423809101 is 101908324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 357777225 + 66031876 = 18915^2 + 8126^2 .

It is a cyclic number.

It is not a de Polignac number, because 423809101 - 2⁵ = 423809069 is a prime.

It is a super-2 number, since 2×423809101² = 359228308180856402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 423809101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423809107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211904550 + 211904551.

It is an arithmetic number, because the mean of its divisors is an integer number (211904551).

Almost surely, 2^423809101 is an apocalyptic number.

It is an amenable number.

423809101 is a deficient number, since it is larger than the sum of its proper divisors (1).

423809101 is an equidigital number, since it uses as much as digits as its factorization.

423809101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 423809101 is about 20586.6243226033. The cubic root of 423809101 is about 751.1443868760.

The spelling of 423809101 in words is "four hundred twenty-three million, eight hundred nine thousand, one hundred one".