1402689389 has 2 divisors, whose sum is σ = 1402689390. Its totient is φ = 1402689388.

The previous prime is 1402689373. The next prime is 1402689437. The reversal of 1402689389 is 9839862041.

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., 1020291364 + 382398025 = 31942^2 + 19555^2 .

It is an emirp because it is prime and its reverse (9839862041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1402689389 - 2⁴ = 1402689373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1402689359) 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, 701344694 + 701344695.

It is an arithmetic number, because the mean of its divisors is an integer number (701344695).

Almost surely, 2^1402689389 is an apocalyptic number.

It is an amenable number.

1402689389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402689389 is an equidigital number, since it uses as much as digits as its factorization.

1402689389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 1402689389 is about 37452.4950971227. The cubic root of 1402689389 is about 1119.4048147710.

The spelling of 1402689389 in words is "one billion, four hundred two million, six hundred eighty-nine thousand, three hundred eighty-nine".