856493501 has 8 divisors (see below), whose sum is σ = 894553440. Its totient is φ = 819218448.

The previous prime is 856493483. The next prime is 856493543. The reversal of 856493501 is 105394658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 856493501 - 2⁶ = 856493437 is a prime.

It is a super-2 number, since 2×856493501² = 1467162234510474002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856493581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193991 + ... + 198356.

It is an arithmetic number, because the mean of its divisors is an integer number (111819180).

Almost surely, 2^856493501 is an apocalyptic number.

It is an amenable number.

856493501 is a deficient number, since it is larger than the sum of its proper divisors (38059939).

856493501 is a wasteful number, since it uses less digits than its factorization.

856493501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392443.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 856493501 is about 29265.9102199129. The cubic root of 856493501 is about 949.6743116258.

The spelling of 856493501 in words is "eight hundred fifty-six million, four hundred ninety-three thousand, five hundred one".