978650123 has 4 divisors (see below), whose sum is σ = 1067618328. Its totient is φ = 889681920.

The previous prime is 978650093. The next prime is 978650137. The reversal of 978650123 is 321056879.

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

It is a cyclic number.

It is not a de Polignac number, because 978650123 - 2²⁶ = 911541259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978650143) 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, 44484086 + ... + 44484107.

It is an arithmetic number, because the mean of its divisors is an integer number (266904582).

Almost surely, 2^978650123 is an apocalyptic number.

978650123 is a deficient number, since it is larger than the sum of its proper divisors (88968205).

978650123 is a wasteful number, since it uses less digits than its factorization.

978650123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88968204.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 978650123 is about 31283.3841359914. The cubic root of 978650123 is about 992.8321185675.

The spelling of 978650123 in words is "nine hundred seventy-eight million, six hundred fifty thousand, one hundred twenty-three".