1394129249 has 2 divisors, whose sum is σ = 1394129250. Its totient is φ = 1394129248.

The previous prime is 1394129221. The next prime is 1394129279. The reversal of 1394129249 is 9429214931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1158721600 + 235407649 = 34040^2 + 15343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1394129249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1394129279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697064624 + 697064625.

It is an arithmetic number, because the mean of its divisors is an integer number (697064625).

Almost surely, 2^1394129249 is an apocalyptic number.

It is an amenable number.

1394129249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394129249 is an equidigital number, since it uses as much as digits as its factorization.

1394129249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 1394129249 is about 37338.0402404840. The cubic root of 1394129249 is about 1117.1230502311.

The spelling of 1394129249 in words is "one billion, three hundred ninety-four million, one hundred twenty-nine thousand, two hundred forty-nine".