100420079 has 2 divisors, whose sum is σ = 100420080. Its totient is φ = 100420078.

The previous prime is 100420051. The next prime is 100420081. The reversal of 100420079 is 970024001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100420079 - 2¹² = 100415983 is a prime.

Together with 100420081, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100420009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50210039 + 50210040.

It is an arithmetic number, because the mean of its divisors is an integer number (50210040).

Almost surely, 2^100420079 is an apocalyptic number.

100420079 is a deficient number, since it is larger than the sum of its proper divisors (1).

100420079 is an equidigital number, since it uses as much as digits as its factorization.

100420079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 100420079 is about 10020.9819379141. The cubic root of 100420079 is about 464.8079200508.

The spelling of 100420079 in words is "one hundred million, four hundred twenty thousand, seventy-nine".