10408781 has 4 divisors (see below), whose sum is σ = 10534272. Its totient is φ = 10283292.

The previous prime is 10408771. The next prime is 10408787. The reversal of 10408781 is 18780401.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18780401 = 47 ⋅399583.

It is a cyclic number.

It is not a de Polignac number, because 10408781 - 2¹⁴ = 10392397 is a prime.

It is a super-2 number, since 2×10408781² = 216685443811922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10408787) 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, 62621 + ... + 62786.

It is an arithmetic number, because the mean of its divisors is an integer number (2633568).

Almost surely, 2^10408781 is an apocalyptic number.

It is an amenable number.

10408781 is a deficient number, since it is larger than the sum of its proper divisors (125491).

10408781 is an equidigital number, since it uses as much as digits as its factorization.

10408781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125490.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 10408781 is about 3226.2642483219. The cubic root of 10408781 is about 218.3399921569.

The spelling of 10408781 in words is "ten million, four hundred eight thousand, seven hundred eighty-one".