730512681 has 32 divisors (see below), whose sum is σ = 1032818688. Its totient is φ = 458734080.

The previous prime is 730512649. The next prime is 730512701. The reversal of 730512681 is 186215037.

It is not a de Polignac number, because 730512681 - 2⁵ = 730512649 is a prime.

It is a super-2 number, since 2×730512681² = 1067297554203615522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (730512611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 429625 + ... + 431321.

It is an arithmetic number, because the mean of its divisors is an integer number (32275584).

Almost surely, 2^730512681 is an apocalyptic number.

730512681 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

730512681 is a deficient number, since it is larger than the sum of its proper divisors (302306007).

730512681 is a wasteful number, since it uses less digits than its factorization.

730512681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 730512681 is about 27027.9980945685. The cubic root of 730512681 is about 900.6220723989.

The spelling of 730512681 in words is "seven hundred thirty million, five hundred twelve thousand, six hundred eighty-one".