1042686593 has 4 divisors (see below), whose sum is σ = 1122893268. Its totient is φ = 962479920.

The previous prime is 1042686583. The next prime is 1042686611. The reversal of 1042686593 is 3956862401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3956862401 = 173 ⋅22872037.

It can be written as a sum of positive squares in 2 ways, for example, as 552861169 + 489825424 = 23513^2 + 22132^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042686593 - 2²² = 1038492289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042686583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40103318 + ... + 40103343.

It is an arithmetic number, because the mean of its divisors is an integer number (280723317).

Almost surely, 2^1042686593 is an apocalyptic number.

1042686593 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1042686593 is a deficient number, since it is larger than the sum of its proper divisors (80206675).

1042686593 is an equidigital number, since it uses as much as digits as its factorization.

1042686593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80206674.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 1042686593 is about 32290.6579833858. The cubic root of 1042686593 is about 1014.0310725656.

The spelling of 1042686593 in words is "one billion, forty-two million, six hundred eighty-six thousand, five hundred ninety-three".