730786981 has 4 divisors (see below), whose sum is σ = 762560352. Its totient is φ = 699013612.

The previous prime is 730786967. The next prime is 730787003. The reversal of 730786981 is 189687037.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 730786981 - 2⁷ = 730786853 is a prime.

It is a super-2 number, since 2×730786981² = 1068099223198188722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730786961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15886651 + ... + 15886696.

It is an arithmetic number, because the mean of its divisors is an integer number (190640088).

Almost surely, 2^730786981 is an apocalyptic number.

It is an amenable number.

730786981 is a deficient number, since it is larger than the sum of its proper divisors (31773371).

730786981 is a wasteful number, since it uses less digits than its factorization.

730786981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31773370.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 730786981 is about 27033.0719859952. The cubic root of 730786981 is about 900.7347830686.

The spelling of 730786981 in words is "seven hundred thirty million, seven hundred eighty-six thousand, nine hundred eighty-one".