1098648697 has 4 divisors (see below), whose sum is σ = 1100007540. Its totient is φ = 1097289856.

The previous prime is 1098648689. The next prime is 1098648703. The reversal of 1098648697 is 7968468901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7968468901 = 11551 ⋅689851.

It can be written as a sum of positive squares in 2 ways, for example, as 769008361 + 329640336 = 27731^2 + 18156^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098648697 - 2³ = 1098648689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098648197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678208 + ... + 679825.

It is an arithmetic number, because the mean of its divisors is an integer number (275001885).

Almost surely, 2^1098648697 is an apocalyptic number.

It is an amenable number.

1098648697 is a deficient number, since it is larger than the sum of its proper divisors (1358843).

1098648697 is an equidigital number, since it uses as much as digits as its factorization.

1098648697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358842.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The square root of 1098648697 is about 33145.8699840568. The cubic root of 1098648697 is about 1031.8572382418.

The spelling of 1098648697 in words is "one billion, ninety-eight million, six hundred forty-eight thousand, six hundred ninety-seven".