10423781 has 4 divisors (see below), whose sum is σ = 10760064. Its totient is φ = 10087500.

The previous prime is 10423753. The next prime is 10423823. The reversal of 10423781 is 18732401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10423781 is a prime.

It is a super-2 number, since 2×10423781² = 217310420671922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10423781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10423711) 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, 168095 + ... + 168156.

It is an arithmetic number, because the mean of its divisors is an integer number (2690016).

Almost surely, 2^10423781 is an apocalyptic number.

It is an amenable number.

10423781 is a deficient number, since it is larger than the sum of its proper divisors (336283).

10423781 is an equidigital number, since it uses as much as digits as its factorization.

10423781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336282.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 10423781 is about 3228.5880814994. The cubic root of 10423781 is about 218.4448244102. Note that the first 3 decimals are identical.

The spelling of 10423781 in words is "ten million, four hundred twenty-three thousand, seven hundred eighty-one".