1402681009 has 2 divisors, whose sum is σ = 1402681010. Its totient is φ = 1402681008.

The previous prime is 1402681003. The next prime is 1402681043. The reversal of 1402681009 is 9001862041.

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., 857318400 + 545362609 = 29280^2 + 23353^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402681009 - 2⁵ = 1402680977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1402681003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701340504 + 701340505.

It is an arithmetic number, because the mean of its divisors is an integer number (701340505).

Almost surely, 2^1402681009 is an apocalyptic number.

It is an amenable number.

1402681009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402681009 is an equidigital number, since it uses as much as digits as its factorization.

1402681009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1402681009 is about 37452.3832218992. The cubic root of 1402681009 is about 1119.4025855697.

The spelling of 1402681009 in words is "one billion, four hundred two million, six hundred eighty-one thousand, nine".