1098061509 has 16 divisors (see below), whose sum is σ = 1590855680. Its totient is φ = 671140080.

The previous prime is 1098061487. The next prime is 1098061529. The reversal of 1098061509 is 9051608901.

It is not a de Polignac number, because 1098061509 - 2⁵ = 1098061477 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098061529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308947 + ... + 312480.

It is an arithmetic number, because the mean of its divisors is an integer number (99428480).

Almost surely, 2^1098061509 is an apocalyptic number.

1098061509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1098061509 is a deficient number, since it is larger than the sum of its proper divisors (492794171).

1098061509 is a wasteful number, since it uses less digits than its factorization.

1098061509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621480.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 1098061509 is about 33137.0111657645. The cubic root of 1098061509 is about 1031.6733753550.

The spelling of 1098061509 in words is "one billion, ninety-eight million, sixty-one thousand, five hundred nine".