103405091 has 4 divisors (see below), whose sum is σ = 103616184. Its totient is φ = 103194000.

The previous prime is 103405073. The next prime is 103405109. The reversal of 103405091 is 190504301.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (103405073) and next prime (103405109).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103405091 is a prime.

It is a super-2 number, since 2×103405091² = 21385225689436562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103405061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104810 + ... + 105791.

It is an arithmetic number, because the mean of its divisors is an integer number (25904046).

Almost surely, 2^103405091 is an apocalyptic number.

103405091 is a deficient number, since it is larger than the sum of its proper divisors (211093).

103405091 is an equidigital number, since it uses as much as digits as its factorization.

103405091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211092.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 103405091 is about 10168.8293819889. The cubic root of 103405091 is about 469.3685363202.

Adding to 103405091 its reverse (190504301), we get a palindrome (293909392).

The spelling of 103405091 in words is "one hundred three million, four hundred five thousand, ninety-one".