1428606191 has 2 divisors, whose sum is σ = 1428606192. Its totient is φ = 1428606190.

The previous prime is 1428606187. The next prime is 1428606233. The reversal of 1428606191 is 1916068241.

It is a weak prime.

It is an emirp because it is prime and its reverse (1916068241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1428606191 - 2² = 1428606187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428606121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714303095 + 714303096.

It is an arithmetic number, because the mean of its divisors is an integer number (714303096).

Almost surely, 2^1428606191 is an apocalyptic number.

1428606191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428606191 is an equidigital number, since it uses as much as digits as its factorization.

1428606191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1428606191 is about 37796.9071618301. The cubic root of 1428606191 is about 1126.2570156289.

The spelling of 1428606191 in words is "one billion, four hundred twenty-eight million, six hundred six thousand, one hundred ninety-one".