30919973 has 16 divisors (see below), whose sum is σ = 37355520. Its totient is φ = 25001136.

The previous prime is 30919969. The next prime is 30919979. The reversal of 30919973 is 37991903.

It is a cyclic number.

It is not a de Polignac number, because 30919973 - 2² = 30919969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30919973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30919979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50636 + ... + 51242.

It is an arithmetic number, because the mean of its divisors is an integer number (2334720).

Almost surely, 2^30919973 is an apocalyptic number.

It is an amenable number.

30919973 is a deficient number, since it is larger than the sum of its proper divisors (6435547).

30919973 is a wasteful number, since it uses less digits than its factorization.

30919973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 30919973 is about 5560.5730819764. The cubic root of 30919973 is about 313.8675148013.

The spelling of 30919973 in words is "thirty million, nine hundred nineteen thousand, nine hundred seventy-three".