30899121 has 16 divisors (see below), whose sum is σ = 45059328. Its totient is φ = 18678800.

The previous prime is 30899087. The next prime is 30899147. The reversal of 30899121 is 12199803.

It is a cyclic number.

It is not a de Polignac number, because 30899121 - 2¹³ = 30890929 is a prime.

It is a super-3 number, since 3×30899121³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (30899021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15250 + ... + 17156.

It is an arithmetic number, because the mean of its divisors is an integer number (2816208).

Almost surely, 2^30899121 is an apocalyptic number.

It is an amenable number.

30899121 is a deficient number, since it is larger than the sum of its proper divisors (14160207).

30899121 is a wasteful number, since it uses less digits than its factorization.

30899121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 30899121 is about 5558.6977791566. The cubic root of 30899121 is about 313.7969429716.

The spelling of 30899121 in words is "thirty million, eight hundred ninety-nine thousand, one hundred twenty-one".