1098977449 has 2 divisors, whose sum is σ = 1098977450. Its totient is φ = 1098977448.

The previous prime is 1098977447. The next prime is 1098977501. The reversal of 1098977449 is 9447798901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 611671824 + 487305625 = 24732^2 + 22075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098977449 - 2¹ = 1098977447 is a prime.

Together with 1098977447, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1098977393 and 1098977402.

It is not a weakly prime, because it can be changed into another prime (1098977447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549488724 + 549488725.

It is an arithmetic number, because the mean of its divisors is an integer number (549488725).

Almost surely, 2^1098977449 is an apocalyptic number.

It is an amenable number.

1098977449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098977449 is an equidigital number, since it uses as much as digits as its factorization.

1098977449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The square root of 1098977449 is about 33150.8287830033. The cubic root of 1098977449 is about 1031.9601499070.

The spelling of 1098977449 in words is "one billion, ninety-eight million, nine hundred seventy-seven thousand, four hundred forty-nine".