103263991 has 4 divisors (see below), whose sum is σ = 103384512. Its totient is φ = 103143472.

The previous prime is 103263977. The next prime is 103264009. The reversal of 103263991 is 199362301.

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

It is a cyclic number.

It is not a de Polignac number, because 103263991 - 2⁷ = 103263863 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 (103263961) 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, 58966 + ... + 60691.

It is an arithmetic number, because the mean of its divisors is an integer number (25846128).

Almost surely, 2^103263991 is an apocalyptic number.

103263991 is a deficient number, since it is larger than the sum of its proper divisors (120521).

103263991 is an equidigital number, since it uses as much as digits as its factorization.

103263991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120520.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 103263991 is about 10161.8891452328. The cubic root of 103263991 is about 469.1549490066.

The spelling of 103263991 in words is "one hundred three million, two hundred sixty-three thousand, nine hundred ninety-one".