1326457631 has 2 divisors, whose sum is σ = 1326457632. Its totient is φ = 1326457630.

The previous prime is 1326457603. The next prime is 1326457673. The reversal of 1326457631 is 1367546231.

It is a weak prime.

It is an emirp because it is prime and its reverse (1367546231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1326457631 - 2⁶ = 1326457567 is a prime.

It is a super-2 number, since 2×1326457631² = 3518979693676264322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1326451631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663228815 + 663228816.

It is an arithmetic number, because the mean of its divisors is an integer number (663228816).

Almost surely, 2^1326457631 is an apocalyptic number.

1326457631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326457631 is an equidigital number, since it uses as much as digits as its factorization.

1326457631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 1326457631 is about 36420.5660444755. The cubic root of 1326457631 is about 1098.7472324680.

The spelling of 1326457631 in words is "one billion, three hundred twenty-six million, four hundred fifty-seven thousand, six hundred thirty-one".