981293123 has 2 divisors, whose sum is σ = 981293124. Its totient is φ = 981293122.

The previous prime is 981293111. The next prime is 981293191. The reversal of 981293123 is 321392189.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981293123 - 2²² = 977098819 is a prime.

It is not a weakly prime, because it can be changed into another prime (981293923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490646561 + 490646562.

It is an arithmetic number, because the mean of its divisors is an integer number (490646562).

Almost surely, 2^981293123 is an apocalyptic number.

981293123 is a deficient number, since it is larger than the sum of its proper divisors (1).

981293123 is an equidigital number, since it uses as much as digits as its factorization.

981293123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 981293123 is about 31325.5985258063. The cubic root of 981293123 is about 993.7250820961.

The spelling of 981293123 in words is "nine hundred eighty-one million, two hundred ninety-three thousand, one hundred twenty-three".