30910997 has 4 divisors (see below), whose sum is σ = 33288780. Its totient is φ = 28533216.

The previous prime is 30910969. The next prime is 30911009. The reversal of 30910997 is 79901903.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6220036 + 24690961 = 2494^2 + 4969^2 .

It is a cyclic number.

It is not a de Polignac number, because 30910997 - 2¹⁴ = 30894613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30910997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30910927) 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, 1188872 + ... + 1188897.

It is an arithmetic number, because the mean of its divisors is an integer number (8322195).

Almost surely, 2^30910997 is an apocalyptic number.

It is an amenable number.

30910997 is a deficient number, since it is larger than the sum of its proper divisors (2377783).

30910997 is a wasteful number, since it uses less digits than its factorization.

30910997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377782.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 30910997 is about 5559.7659123384. The cubic root of 30910997 is about 313.8371401793.

The spelling of 30910997 in words is "thirty million, nine hundred ten thousand, nine hundred ninety-seven".