1386326531 has 2 divisors, whose sum is σ = 1386326532. Its totient is φ = 1386326530.

The previous prime is 1386326509. The next prime is 1386326533. The reversal of 1386326531 is 1356236831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1386326531 - 2¹⁴ = 1386310147 is a prime.

It is a super-2 number, since 2×1386326531² = 3843802501108987922, which contains 22 as substring.

Together with 1386326533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1386326533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693163265 + 693163266.

It is an arithmetic number, because the mean of its divisors is an integer number (693163266).

Almost surely, 2^1386326531 is an apocalyptic number.

1386326531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386326531 is an equidigital number, since it uses as much as digits as its factorization.

1386326531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 1386326531 is about 37233.4061160136. The cubic root of 1386326531 is about 1115.0350303700.

The spelling of 1386326531 in words is "one billion, three hundred eighty-six million, three hundred twenty-six thousand, five hundred thirty-one".