30998699109 has 28 divisors (see below), whose sum is σ = 53116337376. Its totient is φ = 17713539432.

The previous prime is 30998699107. The next prime is 30998699159. The reversal of 30998699109 is 90199689903.

It is not a de Polignac number, because 30998699109 - 2¹ = 30998699107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30998699107) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3032199 + ... + 3042404.

Almost surely, 2^30998699109 is an apocalyptic number.

It is an amenable number.

30998699109 is a deficient number, since it is larger than the sum of its proper divisors (22117638267).

30998699109 is an frugal number, since it uses more digits than its factorization.

30998699109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6074628 (or 6074613 counting only the distinct ones).

The product of its (nonzero) digits is 8503056, while the sum is 63.

The spelling of 30998699109 in words is "thirty billion, nine hundred ninety-eight million, six hundred ninety-nine thousand, one hundred nine".