30970493 has 4 divisors (see below), whose sum is σ = 31478268. Its totient is φ = 30462720.

The previous prime is 30970483. The next prime is 30970501. The reversal of 30970493 is 39407903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39407903 = 103 ⋅382601.

It can be written as a sum of positive squares in 2 ways, for example, as 11847364 + 19123129 = 3442^2 + 4373^2 .

It is a cyclic number.

It is not a de Polignac number, because 30970493 - 2⁴ = 30970477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30970453) 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, 253796 + ... + 253917.

It is an arithmetic number, because the mean of its divisors is an integer number (7869567).

Almost surely, 2^30970493 is an apocalyptic number.

It is an amenable number.

30970493 is a deficient number, since it is larger than the sum of its proper divisors (507775).

30970493 is an equidigital number, since it uses as much as digits as its factorization.

30970493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507774.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 30970493 is about 5565.1139251591. The cubic root of 30970493 is about 314.0383640091.

The spelling of 30970493 in words is "thirty million, nine hundred seventy thousand, four hundred ninety-three".