420101791 has 2 divisors, whose sum is σ = 420101792. Its totient is φ = 420101790.

The previous prime is 420101789. The next prime is 420101813. The reversal of 420101791 is 197101024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420101791 - 2¹ = 420101789 is a prime.

Together with 420101789, 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 (420101741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210050895 + 210050896.

It is an arithmetic number, because the mean of its divisors is an integer number (210050896).

Almost surely, 2^420101791 is an apocalyptic number.

420101791 is a deficient number, since it is larger than the sum of its proper divisors (1).

420101791 is an equidigital number, since it uses as much as digits as its factorization.

420101791 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 25.

The square root of 420101791 is about 20496.3848275739. The cubic root of 420101791 is about 748.9477338198.

The spelling of 420101791 in words is "four hundred twenty million, one hundred one thousand, seven hundred ninety-one".