1098979919 has 2 divisors, whose sum is σ = 1098979920. Its totient is φ = 1098979918.

The previous prime is 1098979913. The next prime is 1098979933. The reversal of 1098979919 is 9199798901.

It is a weak prime.

It is an emirp because it is prime and its reverse (9199798901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1098979919 - 2²⁰ = 1097931343 is a prime.

It is a super-2 number, since 2×1098979919² = 2415513724730493122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1098979913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549489959 + 549489960.

It is an arithmetic number, because the mean of its divisors is an integer number (549489960).

Almost surely, 2^1098979919 is an apocalyptic number.

1098979919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098979919 is an equidigital number, since it uses as much as digits as its factorization.

1098979919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3306744, while the sum is 62.

The square root of 1098979919 is about 33150.8660369529. The cubic root of 1098979919 is about 1031.9609230316.

The spelling of 1098979919 in words is "one billion, ninety-eight million, nine hundred seventy-nine thousand, nine hundred nineteen".