840523475 has 18 divisors (see below), whose sum is σ = 1145616780. Its totient is φ = 611287600.

The previous prime is 840523471. The next prime is 840523507. The reversal of 840523475 is 574325048.

It is a happy number.

It is not a de Polignac number, because 840523475 - 2² = 840523471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840523471) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 135905 + ... + 141954.

Almost surely, 2^840523475 is an apocalyptic number.

840523475 is a deficient number, since it is larger than the sum of its proper divisors (305093305).

840523475 is a wasteful number, since it uses less digits than its factorization.

840523475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277891 (or 277875 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 38.

The square root of 840523475 is about 28991.7828875701. The cubic root of 840523475 is about 943.7347549545.

The spelling of 840523475 in words is "eight hundred forty million, five hundred twenty-three thousand, four hundred seventy-five".