1428229897 has 2 divisors, whose sum is σ = 1428229898. Its totient is φ = 1428229896.

The previous prime is 1428229877. The next prime is 1428229931. The reversal of 1428229897 is 7989228241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1420988416 + 7241481 = 37696^2 + 2691^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428229897 - 2²³ = 1419841289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1428229807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714114948 + 714114949.

It is an arithmetic number, because the mean of its divisors is an integer number (714114949).

Almost surely, 2^1428229897 is an apocalyptic number.

It is an amenable number.

1428229897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428229897 is an equidigital number, since it uses as much as digits as its factorization.

1428229897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 52.

The square root of 1428229897 is about 37791.9289928418. The cubic root of 1428229897 is about 1126.1581218083.

The spelling of 1428229897 in words is "one billion, four hundred twenty-eight million, two hundred twenty-nine thousand, eight hundred ninety-seven".