10123391 has 4 divisors (see below), whose sum is σ = 10449984. Its totient is φ = 9796800.

The previous prime is 10123387. The next prime is 10123411. The reversal of 10123391 is 19332101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19332101 = 19 ⋅1017479.

It is a cyclic number.

It is not a de Polignac number, because 10123391 - 2² = 10123387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123301) 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, 163250 + ... + 163311.

It is an arithmetic number, because the mean of its divisors is an integer number (2612496).

Almost surely, 2^10123391 is an apocalyptic number.

10123391 is a deficient number, since it is larger than the sum of its proper divisors (326593).

10123391 is an equidigital number, since it uses as much as digits as its factorization.

10123391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326592.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 10123391 is about 3181.7276753362. The cubic root of 10123391 is about 216.3259752869.

Adding to 10123391 its reverse (19332101), we get a palindrome (29455492).

The spelling of 10123391 in words is "ten million, one hundred twenty-three thousand, three hundred ninety-one".