981965123 has 4 divisors (see below), whose sum is σ = 984556440. Its totient is φ = 979373808.

The previous prime is 981965111. The next prime is 981965137. The reversal of 981965123 is 321569189.

It is a happy number.

981965123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981965123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981965183) 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, 1295090 + ... + 1295847.

It is an arithmetic number, because the mean of its divisors is an integer number (246139110).

Almost surely, 2^981965123 is an apocalyptic number.

981965123 is a deficient number, since it is larger than the sum of its proper divisors (2591317).

981965123 is a wasteful number, since it uses less digits than its factorization.

981965123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591316.

The product of its digits is 116640, while the sum is 44.

The square root of 981965123 is about 31336.3227421470. The cubic root of 981965123 is about 993.9518681815.

The spelling of 981965123 in words is "nine hundred eighty-one million, nine hundred sixty-five thousand, one hundred twenty-three".