103997891 has 16 divisors (see below), whose sum is σ = 112343040. Its totient is φ = 95921280.

The previous prime is 103997879. The next prime is 103997897. The reversal of 103997891 is 198799301.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103997891 is a prime.

It is a super-2 number, since 2×103997891² = 21631122664895762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103997897) 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 15 ways as a sum of consecutive naturals, for example, 283190 + ... + 283556.

It is an arithmetic number, because the mean of its divisors is an integer number (7021440).

Almost surely, 2^103997891 is an apocalyptic number.

103997891 is a deficient number, since it is larger than the sum of its proper divisors (8345149).

103997891 is a wasteful number, since it uses less digits than its factorization.

103997891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 103997891 is about 10197.9356244291. The cubic root of 103997891 is about 470.2637586990.

The spelling of 103997891 in words is "one hundred three million, nine hundred ninety-seven thousand, eight hundred ninety-one".