1379652509 has 2 divisors, whose sum is σ = 1379652510. Its totient is φ = 1379652508.

The previous prime is 1379652499. The next prime is 1379652577. The reversal of 1379652509 is 9052569731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 916757284 + 462895225 = 30278^2 + 21515^2 .

It is an emirp because it is prime and its reverse (9052569731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1379652509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1379652709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689826254 + 689826255.

It is an arithmetic number, because the mean of its divisors is an integer number (689826255).

Almost surely, 2^1379652509 is an apocalyptic number.

It is an amenable number.

1379652509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379652509 is an equidigital number, since it uses as much as digits as its factorization.

1379652509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 510300, while the sum is 47.

The square root of 1379652509 is about 37143.6738759106. The cubic root of 1379652509 is about 1113.2428257686.

The spelling of 1379652509 in words is "one billion, three hundred seventy-nine million, six hundred fifty-two thousand, five hundred nine".