877238647 has 2 divisors, whose sum is σ = 877238648. Its totient is φ = 877238646.

The previous prime is 877238639. The next prime is 877238711. The reversal of 877238647 is 746832778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 877238647 - 2³ = 877238639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 877238594 and 877238603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (877238617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438619323 + 438619324.

It is an arithmetic number, because the mean of its divisors is an integer number (438619324).

Almost surely, 2^877238647 is an apocalyptic number.

877238647 is a deficient number, since it is larger than the sum of its proper divisors (1).

877238647 is an equidigital number, since it uses as much as digits as its factorization.

877238647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3161088, while the sum is 52.

The square root of 877238647 is about 29618.2147841493. The cubic root of 877238647 is about 957.2805877190.

The spelling of 877238647 in words is "eight hundred seventy-seven million, two hundred thirty-eight thousand, six hundred forty-seven".