730918161 has 20 divisors (see below), whose sum is σ = 1093778532. Its totient is φ = 486425088.

The previous prime is 730918157. The next prime is 730918189. The reversal of 730918161 is 161819037.

It can be written as a sum of positive squares in 2 ways, for example, as 543775761 + 187142400 = 23319^2 + 13680^2 .

It is not a de Polignac number, because 730918161 - 2² = 730918157 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (730918141) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40425 + ... + 55641.

Almost surely, 2^730918161 is an apocalyptic number.

It is an amenable number.

730918161 is a deficient number, since it is larger than the sum of its proper divisors (362860371).

730918161 is a wasteful number, since it uses less digits than its factorization.

730918161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15822 (or 15813 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 730918161 is about 27035.4981644504. The cubic root of 730918161 is about 900.7886753439.

The spelling of 730918161 in words is "seven hundred thirty million, nine hundred eighteen thousand, one hundred sixty-one".