1361640031 has 2 divisors, whose sum is σ = 1361640032. Its totient is φ = 1361640030.

The previous prime is 1361640029. The next prime is 1361640037. The reversal of 1361640031 is 1300461631.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1361640031 - 2¹ = 1361640029 is a prime.

It is a super-2 number, since 2×1361640031² = 3708127148043361922, which contains 22 as substring.

Together with 1361640029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1361639978 and 1361640005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361640037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680820015 + 680820016.

It is an arithmetic number, because the mean of its divisors is an integer number (680820016).

Almost surely, 2^1361640031 is an apocalyptic number.

1361640031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361640031 is an equidigital number, since it uses as much as digits as its factorization.

1361640031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1361640031 is about 36900.4069218755. The cubic root of 1361640031 is about 1108.3768259464.

The spelling of 1361640031 in words is "one billion, three hundred sixty-one million, six hundred forty thousand, thirty-one".