1406994509 has 2 divisors, whose sum is σ = 1406994510. Its totient is φ = 1406994508.

The previous prime is 1406994493. The next prime is 1406994577. The reversal of 1406994509 is 9054996041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1375668100 + 31326409 = 37090^2 + 5597^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406994509 - 2⁴ = 1406994493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1406994109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703497254 + 703497255.

It is an arithmetic number, because the mean of its divisors is an integer number (703497255).

Almost surely, 2^1406994509 is an apocalyptic number.

It is an amenable number.

1406994509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406994509 is an equidigital number, since it uses as much as digits as its factorization.

1406994509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 1406994509 is about 37509.9254731331. The cubic root of 1406994509 is about 1120.5488670859.

The spelling of 1406994509 in words is "one billion, four hundred six million, nine hundred ninety-four thousand, five hundred nine".