30797131 has 4 divisors (see below), whose sum is σ = 31302064. Its totient is φ = 30292200.

The previous prime is 30797113. The next prime is 30797141. The reversal of 30797131 is 13179703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13179703 = 853 ⋅15451.

It is a cyclic number.

It is not a de Polignac number, because 30797131 - 2⁵ = 30797099 is a prime.

It is a super-2 number, since 2×30797131² = 1896926555662322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30797093 and 30797102.

It is not an unprimeable number, because it can be changed into a prime (30797111) 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, 252375 + ... + 252496.

It is an arithmetic number, because the mean of its divisors is an integer number (7825516).

Almost surely, 2^30797131 is an apocalyptic number.

30797131 is a deficient number, since it is larger than the sum of its proper divisors (504933).

30797131 is an equidigital number, since it uses as much as digits as its factorization.

30797131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504932.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 30797131 is about 5549.5162852270. The cubic root of 30797131 is about 313.4513082484.

The spelling of 30797131 in words is "thirty million, seven hundred ninety-seven thousand, one hundred thirty-one".