1405134989 has 2 divisors, whose sum is σ = 1405134990. Its totient is φ = 1405134988.

The previous prime is 1405134953. The next prime is 1405135013. The reversal of 1405134989 is 9894315041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1304293225 + 100841764 = 36115^2 + 10042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405134989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405134589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702567494 + 702567495.

It is an arithmetic number, because the mean of its divisors is an integer number (702567495).

Almost surely, 2^1405134989 is an apocalyptic number.

It is an amenable number.

1405134989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405134989 is an equidigital number, since it uses as much as digits as its factorization.

1405134989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 1405134989 is about 37485.1302385359. The cubic root of 1405134989 is about 1120.0550007535.

The spelling of 1405134989 in words is "one billion, four hundred five million, one hundred thirty-four thousand, nine hundred eighty-nine".