30901393 has 8 divisors (see below), whose sum is σ = 32768712. Its totient is φ = 29039616.

The previous prime is 30901369. The next prime is 30901399. The reversal of 30901393 is 39310903.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3359889 + 27541504 = 1833^2 + 5248^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30901393 - 2⁵ = 30901361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30901399) 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, 17821 + ... + 19477.

It is an arithmetic number, because the mean of its divisors is an integer number (4096089).

Almost surely, 2^30901393 is an apocalyptic number.

It is an amenable number.

30901393 is a deficient number, since it is larger than the sum of its proper divisors (1867319).

30901393 is a wasteful number, since it uses less digits than its factorization.

30901393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 2187, while the sum is 28.

The square root of 30901393 is about 5558.9021398114. The cubic root of 30901393 is about 313.8046339043.

The spelling of 30901393 in words is "thirty million, nine hundred one thousand, three hundred ninety-three".