840813537 has 8 divisors (see below), whose sum is σ = 1123289280. Its totient is φ = 559440080.

The previous prime is 840813509. The next prime is 840813577. The reversal of 840813537 is 735318048.

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 840813537 - 2¹⁵ = 840780769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 840813495 and 840813504.

It is not an unprimeable number, because it can be changed into a prime (840813577) 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, 273789 + ... + 276842.

It is an arithmetic number, because the mean of its divisors is an integer number (140411160).

Almost surely, 2^840813537 is an apocalyptic number.

It is an amenable number.

840813537 is a deficient number, since it is larger than the sum of its proper divisors (282475743).

840813537 is a wasteful number, since it uses less digits than its factorization.

840813537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551143.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 840813537 is about 28996.7849424725. The cubic root of 840813537 is about 943.8433024314.

It can be divided in two parts, 8408 and 13537, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 840813537 in words is "eight hundred forty million, eight hundred thirteen thousand, five hundred thirty-seven".