103405431 has 8 divisors (see below), whose sum is σ = 140134384. Its totient is φ = 67806720.

The previous prime is 103405409. The next prime is 103405453. The reversal of 103405431 is 134504301.

It is an interprime number because it is at equal distance from previous prime (103405409) and next prime (103405453).

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

It is not a de Polignac number, because 103405431 - 2²² = 99211127 is a prime.

It is a super-2 number, since 2×103405431² = 21385366320591522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103405398 and 103405407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103405531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282346 + ... + 282711.

It is an arithmetic number, because the mean of its divisors is an integer number (17516798).

Almost surely, 2^103405431 is an apocalyptic number.

103405431 is a deficient number, since it is larger than the sum of its proper divisors (36728953).

103405431 is an equidigital number, since it uses as much as digits as its factorization.

103405431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565121.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 103405431 is about 10168.8460997303. The cubic root of 103405431 is about 469.3690507537.

Adding to 103405431 its reverse (134504301), we get a palindrome (237909732).

The spelling of 103405431 in words is "one hundred three million, four hundred five thousand, four hundred thirty-one".