900845123 has 2 divisors, whose sum is σ = 900845124. Its totient is φ = 900845122.

The previous prime is 900845093. The next prime is 900845129. The reversal of 900845123 is 321548009.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 900845123 - 2¹⁰ = 900844099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 900845123.

It is not a weakly prime, because it can be changed into another prime (900845129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450422561 + 450422562.

It is an arithmetic number, because the mean of its divisors is an integer number (450422562).

Almost surely, 2^900845123 is an apocalyptic number.

900845123 is a deficient number, since it is larger than the sum of its proper divisors (1).

900845123 is an equidigital number, since it uses as much as digits as its factorization.

900845123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 900845123 is about 30014.0820782512. The cubic root of 900845123 is about 965.7914964637.

The spelling of 900845123 in words is "nine hundred million, eight hundred forty-five thousand, one hundred twenty-three".