855172763 has 2 divisors, whose sum is σ = 855172764. Its totient is φ = 855172762.

The previous prime is 855172751. The next prime is 855172781. The reversal of 855172763 is 367271558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855172763 - 2¹² = 855168667 is a prime.

It is not a weakly prime, because it can be changed into another prime (855172723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427586381 + 427586382.

It is an arithmetic number, because the mean of its divisors is an integer number (427586382).

Almost surely, 2^855172763 is an apocalyptic number.

855172763 is a deficient number, since it is larger than the sum of its proper divisors (1).

855172763 is an equidigital number, since it uses as much as digits as its factorization.

855172763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 44.

The square root of 855172763 is about 29243.3370701772. The cubic root of 855172763 is about 949.1859186569.

The spelling of 855172763 in words is "eight hundred fifty-five million, one hundred seventy-two thousand, seven hundred sixty-three".