861172303 has 2 divisors, whose sum is σ = 861172304. Its totient is φ = 861172302.

The previous prime is 861172297. The next prime is 861172307. The reversal of 861172303 is 303271168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 861172303 - 2⁵ = 861172271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861172307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430586151 + 430586152.

It is an arithmetic number, because the mean of its divisors is an integer number (430586152).

Almost surely, 2^861172303 is an apocalyptic number.

861172303 is a deficient number, since it is larger than the sum of its proper divisors (1).

861172303 is an equidigital number, since it uses as much as digits as its factorization.

861172303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 861172303 is about 29345.7373906331. The cubic root of 861172303 is about 951.4004471595.

The spelling of 861172303 in words is "eight hundred sixty-one million, one hundred seventy-two thousand, three hundred three".