730642109 has 2 divisors, whose sum is σ = 730642110. Its totient is φ = 730642108.

The previous prime is 730642103. The next prime is 730642147. The reversal of 730642109 is 901246037.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 487438084 + 243204025 = 22078^2 + 15595^2 .

It is a cyclic number.

It is not a de Polignac number, because 730642109 - 2²⁰ = 729593533 is a prime.

It is a super-3 number, since 3×730642109³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (730642103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365321054 + 365321055.

It is an arithmetic number, because the mean of its divisors is an integer number (365321055).

Almost surely, 2^730642109 is an apocalyptic number.

It is an amenable number.

730642109 is a deficient number, since it is larger than the sum of its proper divisors (1).

730642109 is an equidigital number, since it uses as much as digits as its factorization.

730642109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 730642109 is about 27030.3923204973. The cubic root of 730642109 is about 900.6752582564.

The spelling of 730642109 in words is "seven hundred thirty million, six hundred forty-two thousand, one hundred nine".