861347503 has 2 divisors, whose sum is σ = 861347504. Its totient is φ = 861347502.

The previous prime is 861347489. The next prime is 861347527. The reversal of 861347503 is 305743168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 861347503 - 2⁵ = 861347471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861347593) 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, 430673751 + 430673752.

It is an arithmetic number, because the mean of its divisors is an integer number (430673752).

Almost surely, 2^861347503 is an apocalyptic number.

861347503 is a deficient number, since it is larger than the sum of its proper divisors (1).

861347503 is an equidigital number, since it uses as much as digits as its factorization.

861347503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 861347503 is about 29348.7223401633. The cubic root of 861347503 is about 951.4649615644.

The spelling of 861347503 in words is "eight hundred sixty-one million, three hundred forty-seven thousand, five hundred three".