30742879 has 2 divisors, whose sum is σ = 30742880. Its totient is φ = 30742878.

The previous prime is 30742861. The next prime is 30742897. The reversal of 30742879 is 97824703.

Together with next prime (30742897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (30742861) and next prime (30742897).

It is a cyclic number.

It is not a de Polignac number, because 30742879 - 2⁹ = 30742367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30742379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15371439 + 15371440.

It is an arithmetic number, because the mean of its divisors is an integer number (15371440).

Almost surely, 2^30742879 is an apocalyptic number.

30742879 is a deficient number, since it is larger than the sum of its proper divisors (1).

30742879 is an equidigital number, since it uses as much as digits as its factorization.

30742879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 30742879 is about 5544.6261370808. The cubic root of 30742879 is about 313.2671422226.

The spelling of 30742879 in words is "thirty million, seven hundred forty-two thousand, eight hundred seventy-nine".