1098779700497 has 2 divisors, whose sum is σ = 1098779700498. Its totient is φ = 1098779700496.

The previous prime is 1098779700463. The next prime is 1098779700521. The reversal of 1098779700497 is 7940079778901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 856409579776 + 242370120721 = 925424^2 + 492311^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098779700497 - 2¹⁴ = 1098779684113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1098779700197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549389850248 + 549389850249.

It is an arithmetic number, because the mean of its divisors is an integer number (549389850249).

Almost surely, 2^{1098779700497} is an apocalyptic number.

It is an amenable number.

1098779700497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098779700497 is an equidigital number, since it uses as much as digits as its factorization.

1098779700497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56010528, while the sum is 68.

The spelling of 1098779700497 in words is "one trillion, ninety-eight billion, seven hundred seventy-nine million, seven hundred thousand, four hundred ninety-seven".