1002023123 has 8 divisors (see below), whose sum is σ = 1029857280. Its totient is φ = 974567880.

The previous prime is 1002023119. The next prime is 1002023147. The reversal of 1002023123 is 3213202001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1002023123 - 2² = 1002023119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002023098 and 1002023107.

It is not an unprimeable number, because it can be changed into a prime (1002023423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89363 + ... + 99948.

It is an arithmetic number, because the mean of its divisors is an integer number (128732160).

Almost surely, 2^1002023123 is an apocalyptic number.

1002023123 is a deficient number, since it is larger than the sum of its proper divisors (27834157).

1002023123 is an equidigital number, since it uses as much as digits as its factorization.

1002023123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189457.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1002023123 is about 31654.7488222541. The cubic root of 1002023123 is about 1000.6739200631.

Adding to 1002023123 its reverse (3213202001), we get a palindrome (4215225124).

The spelling of 1002023123 in words is "one billion, two million, twenty-three thousand, one hundred twenty-three".