101679421 has 2 divisors, whose sum is σ = 101679422. Its totient is φ = 101679420.

The previous prime is 101679419. The next prime is 101679433. The reversal of 101679421 is 124976101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70476025 + 31203396 = 8395^2 + 5586^2 .

It is a cyclic number.

It is not a de Polignac number, because 101679421 - 2¹ = 101679419 is a prime.

Together with 101679419, 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 (101679491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50839710 + 50839711.

It is an arithmetic number, because the mean of its divisors is an integer number (50839711).

Almost surely, 2^101679421 is an apocalyptic number.

It is an amenable number.

101679421 is a deficient number, since it is larger than the sum of its proper divisors (1).

101679421 is an equidigital number, since it uses as much as digits as its factorization.

101679421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 101679421 is about 10083.6214228818. The cubic root of 101679421 is about 466.7428655052.

The spelling of 101679421 in words is "one hundred one million, six hundred seventy-nine thousand, four hundred twenty-one".