1406487689 has 2 divisors, whose sum is σ = 1406487690. Its totient is φ = 1406487688.

The previous prime is 1406487683. The next prime is 1406487757. The reversal of 1406487689 is 9867846041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 890425600 + 516062089 = 29840^2 + 22717^2 .

It is an emirp because it is prime and its reverse (9867846041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1406487689 - 2²⁴ = 1389710473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1406487689.

It is not a weakly prime, because it can be changed into another prime (1406487683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703243844 + 703243845.

It is an arithmetic number, because the mean of its divisors is an integer number (703243845).

Almost surely, 2^1406487689 is an apocalyptic number.

It is an amenable number.

1406487689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406487689 is an equidigital number, since it uses as much as digits as its factorization.

1406487689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The square root of 1406487689 is about 37503.1690527614. The cubic root of 1406487689 is about 1120.4143048974.

The spelling of 1406487689 in words is "one billion, four hundred six million, four hundred eighty-seven thousand, six hundred eighty-nine".