30990138607 has 4 divisors (see below), whose sum is σ = 30990511336. Its totient is φ = 30989765880.

The previous prime is 30990138551. The next prime is 30990138617. The reversal of 30990138607 is 70683109903.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 30990138607 - 2⁷ = 30990138479 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 (30990138617) 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, 1432 + ... + 248962.

It is an arithmetic number, because the mean of its divisors is an integer number (7747627834).

Almost surely, 2^30990138607 is an apocalyptic number.

30990138607 is a deficient number, since it is larger than the sum of its proper divisors (372729).

30990138607 is a wasteful number, since it uses less digits than its factorization.

30990138607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372728.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 30990138607 in words is "thirty billion, nine hundred ninety million, one hundred thirty-eight thousand, six hundred seven".