681206753 has 16 divisors (see below), whose sum is σ = 725222400. Its totient is φ = 638053200.

The previous prime is 681206719. The next prime is 681206761. The reversal of 681206753 is 357602186.

It is a cyclic number.

It is not a de Polignac number, because 681206753 - 2¹⁴ = 681190369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681200753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 811508 + ... + 812346.

It is an arithmetic number, because the mean of its divisors is an integer number (45326400).

Almost surely, 2^681206753 is an apocalyptic number.

It is an amenable number.

681206753 is a deficient number, since it is larger than the sum of its proper divisors (44015647).

681206753 is a wasteful number, since it uses less digits than its factorization.

681206753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 681206753 is about 26099.9377968607. The cubic root of 681206753 is about 879.8858120604.

The spelling of 681206753 in words is "six hundred eighty-one million, two hundred six thousand, seven hundred fifty-three".