1098386397 has 24 divisors (see below), whose sum is σ = 1663779000. Its totient is φ = 697310208.

The previous prime is 1098386369. The next prime is 1098386431. The reversal of 1098386397 is 7936838901.

It can be written as a sum of positive squares in 4 ways, for example, as 567821241 + 530565156 = 23829^2 + 23034^2 .

It is not a de Polignac number, because 1098386397 - 2¹² = 1098382301 is a prime.

It is a super-2 number, since 2×1098386397² = 2412905354229283218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098386357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9772 + ... + 47877.

It is an arithmetic number, because the mean of its divisors is an integer number (69324125).

Almost surely, 2^1098386397 is an apocalyptic number.

It is an amenable number.

1098386397 is a deficient number, since it is larger than the sum of its proper divisors (565392603).

1098386397 is a wasteful number, since it uses less digits than its factorization.

1098386397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57757 (or 57754 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 1098386397 is about 33141.9129954805. The cubic root of 1098386397 is about 1031.7751138112.

The spelling of 1098386397 in words is "one billion, ninety-eight million, three hundred eighty-six thousand, three hundred ninety-seven".