863677873 has 2 divisors, whose sum is σ = 863677874. Its totient is φ = 863677872.

The previous prime is 863677861. The next prime is 863677897. The reversal of 863677873 is 378776368.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 730783089 + 132894784 = 27033^2 + 11528^2 .

It is a cyclic number.

It is not a de Polignac number, because 863677873 - 2²¹ = 861580721 is a prime.

It is not a weakly prime, because it can be changed into another prime (863677823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431838936 + 431838937.

It is an arithmetic number, because the mean of its divisors is an integer number (431838937).

Almost surely, 2^863677873 is an apocalyptic number.

It is an amenable number.

863677873 is a deficient number, since it is larger than the sum of its proper divisors (1).

863677873 is an equidigital number, since it uses as much as digits as its factorization.

863677873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 55.

The square root of 863677873 is about 29388.3969110260. The cubic root of 863677873 is about 952.3222496299.

The spelling of 863677873 in words is "eight hundred sixty-three million, six hundred seventy-seven thousand, eight hundred seventy-three".