1405429709 has 2 divisors, whose sum is σ = 1405429710. Its totient is φ = 1405429708.

The previous prime is 1405429687. The next prime is 1405429723. The reversal of 1405429709 is 9079245041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1347624100 + 57805609 = 36710^2 + 7603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405429709 - 2²⁸ = 1136994253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405423709) 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, 702714854 + 702714855.

It is an arithmetic number, because the mean of its divisors is an integer number (702714855).

Almost surely, 2^1405429709 is an apocalyptic number.

It is an amenable number.

1405429709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405429709 is an equidigital number, since it uses as much as digits as its factorization.

1405429709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 1405429709 is about 37489.0611912328. The cubic root of 1405429709 is about 1120.1333039144.

The spelling of 1405429709 in words is "one billion, four hundred five million, four hundred twenty-nine thousand, seven hundred nine".