103091421 has 4 divisors (see below), whose sum is σ = 137455232. Its totient is φ = 68727612.

The previous prime is 103091393. The next prime is 103091441. The reversal of 103091421 is 124190301.

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 not a de Polignac number, because 103091421 - 2⁶ = 103091357 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 (103091441) 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, 17181901 + ... + 17181906.

It is an arithmetic number, because the mean of its divisors is an integer number (34363808).

Almost surely, 2^103091421 is an apocalyptic number.

It is an amenable number.

103091421 is a deficient number, since it is larger than the sum of its proper divisors (34363811).

103091421 is an equidigital number, since it uses as much as digits as its factorization.

103091421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34363810.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 103091421 is about 10153.3945555169. The cubic root of 103091421 is about 468.8934599477.

The spelling of 103091421 in words is "one hundred three million, ninety-one thousand, four hundred twenty-one".