705606121513 has 8 divisors (see below), whose sum is σ = 715303172808. Its totient is φ = 695909913984.

The previous prime is 705606121511. The next prime is 705606121547. The reversal of 705606121513 is 315121606507.

It can be written as a sum of positive squares in 4 ways, for example, as 326775719449 + 378830402064 = 571643^2 + 615492^2 .

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 705606121513 - 2¹ = 705606121511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705606121511) 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, 1576395 + ... + 1973887.

It is an arithmetic number, because the mean of its divisors is an integer number (89412896601).

Almost surely, 2^705606121513 is an apocalyptic number.

705606121513 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

705606121513 is a deficient number, since it is larger than the sum of its proper divisors (9697051295).

705606121513 is a wasteful number, since it uses less digits than its factorization.

705606121513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421883.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 705606121513 in words is "seven hundred five billion, six hundred six million, one hundred twenty-one thousand, five hundred thirteen".