2391137863 has 2 divisors, whose sum is σ = 2391137864. Its totient is φ = 2391137862.

The previous prime is 2391137807. The next prime is 2391137921. The reversal of 2391137863 is 3687311932.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2391137863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391137803) 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, 1195568931 + 1195568932.

It is an arithmetic number, because the mean of its divisors is an integer number (1195568932).

Almost surely, 2^2391137863 is an apocalyptic number.

2391137863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391137863 is an equidigital number, since it uses as much as digits as its factorization.

2391137863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 2391137863 is about 48899.2623973000. The cubic root of 2391137863 is about 1337.2159213600.

The spelling of 2391137863 in words is "two billion, three hundred ninety-one million, one hundred thirty-seven thousand, eight hundred sixty-three".