1098610399 has 4 divisors (see below), whose sum is σ = 1099116760. Its totient is φ = 1098104040.

The previous prime is 1098610379. The next prime is 1098610411. The reversal of 1098610399 is 9930168901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9930168901 = 19753 ⋅502717.

It is a cyclic number.

It is not a de Polignac number, because 1098610399 - 2⁵ = 1098610367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098610379) 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, 249912 + ... + 254269.

It is an arithmetic number, because the mean of its divisors is an integer number (274779190).

Almost surely, 2^1098610399 is an apocalyptic number.

1098610399 is a deficient number, since it is larger than the sum of its proper divisors (506361).

1098610399 is an equidigital number, since it uses as much as digits as its factorization.

1098610399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506360.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 1098610399 is about 33145.2922599877. The cubic root of 1098610399 is about 1031.8452482011.

The spelling of 1098610399 in words is "one billion, ninety-eight million, six hundred ten thousand, three hundred ninety-nine".