730728077 has 2 divisors, whose sum is σ = 730728078. Its totient is φ = 730728076.

The previous prime is 730728071. The next prime is 730728091. The reversal of 730728077 is 770827037.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 463928521 + 266799556 = 21539^2 + 16334^2 .

It is a cyclic number.

It is not a de Polignac number, because 730728077 - 2¹⁸ = 730465933 is a prime.

It is a super-2 number, since 2×730728077² = 1067927045032235858, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (730728071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365364038 + 365364039.

It is an arithmetic number, because the mean of its divisors is an integer number (365364039).

Almost surely, 2^730728077 is an apocalyptic number.

It is an amenable number.

730728077 is a deficient number, since it is larger than the sum of its proper divisors (1).

730728077 is an equidigital number, since it uses as much as digits as its factorization.

730728077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115248, while the sum is 41.

The square root of 730728077 is about 27031.9824837173. The cubic root of 730728077 is about 900.7105816215.

The spelling of 730728077 in words is "seven hundred thirty million, seven hundred twenty-eight thousand, seventy-seven".