1391652749 has 2 divisors, whose sum is σ = 1391652750. Its totient is φ = 1391652748.

The previous prime is 1391652737. The next prime is 1391652763. The reversal of 1391652749 is 9472561931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1386445225 + 5207524 = 37235^2 + 2282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1391652749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391652349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695826374 + 695826375.

It is an arithmetic number, because the mean of its divisors is an integer number (695826375).

Almost surely, 2^1391652749 is an apocalyptic number.

It is an amenable number.

1391652749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391652749 is an equidigital number, since it uses as much as digits as its factorization.

1391652749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 1391652749 is about 37304.8622702189. The cubic root of 1391652749 is about 1116.4611807037.

The spelling of 1391652749 in words is "one billion, three hundred ninety-one million, six hundred fifty-two thousand, seven hundred forty-nine".