1428729971 has 2 divisors, whose sum is σ = 1428729972. Its totient is φ = 1428729970.

The previous prime is 1428729961. The next prime is 1428730001. The reversal of 1428729971 is 1799278241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1428729971 - 2²² = 1424535667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1428729961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714364985 + 714364986.

It is an arithmetic number, because the mean of its divisors is an integer number (714364986).

Almost surely, 2^1428729971 is an apocalyptic number.

1428729971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428729971 is an equidigital number, since it uses as much as digits as its factorization.

1428729971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 50.

The square root of 1428729971 is about 37798.5445619272. The cubic root of 1428729971 is about 1126.2895424531.

The spelling of 1428729971 in words is "one billion, four hundred twenty-eight million, seven hundred twenty-nine thousand, nine hundred seventy-one".