856377623 has 2 divisors, whose sum is σ = 856377624. Its totient is φ = 856377622.

The previous prime is 856377593. The next prime is 856377661. The reversal of 856377623 is 326773658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856377623 - 2²⁸ = 587942167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856376623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428188811 + 428188812.

It is an arithmetic number, because the mean of its divisors is an integer number (428188812).

Almost surely, 2^856377623 is an apocalyptic number.

856377623 is a deficient number, since it is larger than the sum of its proper divisors (1).

856377623 is an equidigital number, since it uses as much as digits as its factorization.

856377623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 47.

The square root of 856377623 is about 29263.9304092940. The cubic root of 856377623 is about 949.6314814416.

The spelling of 856377623 in words is "eight hundred fifty-six million, three hundred seventy-seven thousand, six hundred twenty-three".