201123479 has 2 divisors, whose sum is σ = 201123480. Its totient is φ = 201123478.

The previous prime is 201123469. The next prime is 201123509. The reversal of 201123479 is 974321102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201123479 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201123449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561739 + 100561740.

It is an arithmetic number, because the mean of its divisors is an integer number (100561740).

Almost surely, 2^201123479 is an apocalyptic number.

201123479 is a deficient number, since it is larger than the sum of its proper divisors (1).

201123479 is an equidigital number, since it uses as much as digits as its factorization.

201123479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 201123479 is about 14181.8009787192. The cubic root of 201123479 is about 585.8965277979.

The spelling of 201123479 in words is "two hundred one million, one hundred twenty-three thousand, four hundred seventy-nine".