863590623397 has 4 divisors (see below), whose sum is σ = 863593136460. Its totient is φ = 863588110336.

The previous prime is 863590623391. The next prime is 863590623431. The reversal of 863590623397 is 793326095368.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 794435298721 + 69155324676 = 891311^2 + 262974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863590623397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863590623391) 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, 640348 + ... + 1461925.

It is an arithmetic number, because the mean of its divisors is an integer number (215898284115).

Almost surely, 2^863590623397 is an apocalyptic number.

It is an amenable number.

863590623397 is a deficient number, since it is larger than the sum of its proper divisors (2513063).

863590623397 is a wasteful number, since it uses less digits than its factorization.

863590623397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513062.

The product of its (nonzero) digits is 44089920, while the sum is 61.

The spelling of 863590623397 in words is "eight hundred sixty-three billion, five hundred ninety million, six hundred twenty-three thousand, three hundred ninety-seven".