1301323631 has 2 divisors, whose sum is σ = 1301323632. Its totient is φ = 1301323630.

The previous prime is 1301323609. The next prime is 1301323643. The reversal of 1301323631 is 1363231031.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1301323631 - 2⁶ = 1301323567 is a prime.

It is a super-2 number, since 2×1301323631² = 3386886385198048322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1301323597 and 1301323606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301323651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650661815 + 650661816.

It is an arithmetic number, because the mean of its divisors is an integer number (650661816).

Almost surely, 2^1301323631 is an apocalyptic number.

1301323631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301323631 is an equidigital number, since it uses as much as digits as its factorization.

1301323631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 1301323631 is about 36073.8635441229. The cubic root of 1301323631 is about 1091.7631680466.

Adding to 1301323631 its reverse (1363231031), we get a palindrome (2664554662).

The spelling of 1301323631 in words is "one billion, three hundred one million, three hundred twenty-three thousand, six hundred thirty-one".