30999858623 has 4 divisors (see below), whose sum is σ = 31028118480. Its totient is φ = 30971598768.

The previous prime is 30999858613. The next prime is 30999858697. The reversal of 30999858623 is 32685899903.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30999858623 - 2³⁴ = 13819989439 is a prime.

It is a super-2 number, since 2×30999858623² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30999858613) 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, 14128283 + ... + 14130476.

It is an arithmetic number, because the mean of its divisors is an integer number (7757029620).

Almost surely, 2^30999858623 is an apocalyptic number.

30999858623 is a deficient number, since it is larger than the sum of its proper divisors (28259857).

30999858623 is a wasteful number, since it uses less digits than its factorization.

30999858623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28259856.

The product of its (nonzero) digits is 25194240, while the sum is 62.

The spelling of 30999858623 in words is "thirty billion, nine hundred ninety-nine million, eight hundred fifty-eight thousand, six hundred twenty-three".