30105797 has 4 divisors (see below), whose sum is σ = 30147936. Its totient is φ = 30063660.

The previous prime is 30105791. The next prime is 30105811. The reversal of 30105797 is 79750103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79750103 = 619 ⋅128837.

It is a cyclic number.

It is not a de Polignac number, because 30105797 - 2⁸ = 30105541 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 (30105791) 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, 19979 + ... + 21432.

It is an arithmetic number, because the mean of its divisors is an integer number (7536984).

Almost surely, 2^30105797 is an apocalyptic number.

It is an amenable number.

30105797 is a deficient number, since it is larger than the sum of its proper divisors (42139).

30105797 is an equidigital number, since it uses as much as digits as its factorization.

30105797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42138.

The product of its (nonzero) digits is 6615, while the sum is 32.

The square root of 30105797 is about 5486.8749757945. The cubic root of 30105797 is about 311.0880841470.

The spelling of 30105797 in words is "thirty million, one hundred five thousand, seven hundred ninety-seven".