30896991 has 8 divisors (see below), whose sum is σ = 45773360. Its totient is φ = 20597976.

The previous prime is 30896989. The next prime is 30897017. The reversal of 30896991 is 19969803.

It is not a de Polignac number, because 30896991 - 2¹ = 30896989 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 (30896911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572140 + ... + 572193.

It is an arithmetic number, because the mean of its divisors is an integer number (5721670).

Almost surely, 2^30896991 is an apocalyptic number.

30896991 is a deficient number, since it is larger than the sum of its proper divisors (14876369).

30896991 is a wasteful number, since it uses less digits than its factorization.

30896991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144342 (or 1144336 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 30896991 is about 5558.5061842189. The cubic root of 30896991 is about 313.7897323798.

The spelling of 30896991 in words is "thirty million, eight hundred ninety-six thousand, nine hundred ninety-one".