861387463 has 2 divisors, whose sum is σ = 861387464. Its totient is φ = 861387462.

The previous prime is 861387427. The next prime is 861387469. The reversal of 861387463 is 364783168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 861387463 - 2⁹ = 861386951 is a prime.

It is a super-2 number, since 2×861387463² = 1483976722827152738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861387469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430693731 + 430693732.

It is an arithmetic number, because the mean of its divisors is an integer number (430693732).

Almost surely, 2^861387463 is an apocalyptic number.

861387463 is a deficient number, since it is larger than the sum of its proper divisors (1).

861387463 is an equidigital number, since it uses as much as digits as its factorization.

861387463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 46.

The square root of 861387463 is about 29349.4031114774. The cubic root of 861387463 is about 951.4796749261.

The spelling of 861387463 in words is "eight hundred sixty-one million, three hundred eighty-seven thousand, four hundred sixty-three".