1406334509 has 2 divisors, whose sum is σ = 1406334510. Its totient is φ = 1406334508.

The previous prime is 1406334463. The next prime is 1406334511. The reversal of 1406334509 is 9054336041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783832009 + 622502500 = 27997^2 + 24950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406334509 - 2¹⁶ = 1406268973 is a prime.

Together with 1406334511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1406334529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703167254 + 703167255.

It is an arithmetic number, because the mean of its divisors is an integer number (703167255).

Almost surely, 2^1406334509 is an apocalyptic number.

It is an amenable number.

1406334509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406334509 is an equidigital number, since it uses as much as digits as its factorization.

1406334509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 1406334509 is about 37501.1267697385. The cubic root of 1406334509 is about 1120.3736287991.

The spelling of 1406334509 in words is "one billion, four hundred six million, three hundred thirty-four thousand, five hundred nine".