1428681437 has 2 divisors, whose sum is σ = 1428681438. Its totient is φ = 1428681436.

The previous prime is 1428681431. The next prime is 1428681451. The reversal of 1428681437 is 7341868241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1151991481 + 276689956 = 33941^2 + 16634^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428681437 - 2²⁸ = 1160245981 is a prime.

It is a super-2 number, since 2×1428681437² = 4082261296856769938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428681431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714340718 + 714340719.

It is an arithmetic number, because the mean of its divisors is an integer number (714340719).

Almost surely, 2^1428681437 is an apocalyptic number.

It is an amenable number.

1428681437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428681437 is an equidigital number, since it uses as much as digits as its factorization.

1428681437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 44.

The square root of 1428681437 is about 37797.9025476282. The cubic root of 1428681437 is about 1126.2767889455.

The spelling of 1428681437 in words is "one billion, four hundred twenty-eight million, six hundred eighty-one thousand, four hundred thirty-seven".