730281778397 has 2 divisors, whose sum is σ = 730281778398. Its totient is φ = 730281778396.

The previous prime is 730281778229. The next prime is 730281778411. The reversal of 730281778397 is 793877182037.

730281778397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 594555113476 + 135726664921 = 771074^2 + 368411^2 .

It is a cyclic number.

It is not a de Polignac number, because 730281778397 - 2⁸ = 730281778141 is a prime.

It is a super-2 number, since 2×730281778397² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (730281778997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365140889198 + 365140889199.

It is an arithmetic number, because the mean of its divisors is an integer number (365140889199).

Almost surely, 2^730281778397 is an apocalyptic number.

It is an amenable number.

730281778397 is a deficient number, since it is larger than the sum of its proper divisors (1).

730281778397 is an equidigital number, since it uses as much as digits as its factorization.

730281778397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24893568, while the sum is 62.

The spelling of 730281778397 in words is "seven hundred thirty billion, two hundred eighty-one million, seven hundred seventy-eight thousand, three hundred ninety-seven".