1379305531 has 2 divisors, whose sum is σ = 1379305532. Its totient is φ = 1379305530.

The previous prime is 1379305463. The next prime is 1379305579. The reversal of 1379305531 is 1355039731.

It is a strong prime.

It is an emirp because it is prime and its reverse (1355039731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1379305531 is a prime.

It is a super-2 number, since 2×1379305531² = 3804967495694383922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1379308531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689652765 + 689652766.

It is an arithmetic number, because the mean of its divisors is an integer number (689652766).

Almost surely, 2^1379305531 is an apocalyptic number.

1379305531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379305531 is an equidigital number, since it uses as much as digits as its factorization.

1379305531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42525, while the sum is 37.

The square root of 1379305531 is about 37139.0028272166. The cubic root of 1379305531 is about 1113.1494923258.

The spelling of 1379305531 in words is "one billion, three hundred seventy-nine million, three hundred five thousand, five hundred thirty-one".