855077747 has 16 divisors (see below), whose sum is σ = 929377152. Its totient is φ = 783565440.

The previous prime is 855077723. The next prime is 855077759. The reversal of 855077747 is 747770558.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 855077747 - 2⁸ = 855077491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 855077695 and 855077704.

It is not an unprimeable number, because it can be changed into a prime (855077947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251972 + ... + 255342.

It is an arithmetic number, because the mean of its divisors is an integer number (58086072).

Almost surely, 2^855077747 is an apocalyptic number.

855077747 is a deficient number, since it is larger than the sum of its proper divisors (74299405).

855077747 is a wasteful number, since it uses less digits than its factorization.

855077747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3778.

The product of its (nonzero) digits is 1920800, while the sum is 50.

The square root of 855077747 is about 29241.7124498549. The cubic root of 855077747 is about 949.1507635032.

The spelling of 855077747 in words is "eight hundred fifty-five million, seventy-seven thousand, seven hundred forty-seven".