100405429 has 2 divisors, whose sum is σ = 100405430. Its totient is φ = 100405428.

The previous prime is 100405427. The next prime is 100405447. The reversal of 100405429 is 924504001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99540529 + 864900 = 9977^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 100405429 - 2¹ = 100405427 is a prime.

Together with 100405427, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100405421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50202714 + 50202715.

It is an arithmetic number, because the mean of its divisors is an integer number (50202715).

Almost surely, 2^100405429 is an apocalyptic number.

It is an amenable number.

100405429 is a deficient number, since it is larger than the sum of its proper divisors (1).

100405429 is an equidigital number, since it uses as much as digits as its factorization.

100405429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 100405429 is about 10020.2509449614. The cubic root of 100405429 is about 464.7853157826.

The spelling of 100405429 in words is "one hundred million, four hundred five thousand, four hundred twenty-nine".