104963991 has 32 divisors (see below), whose sum is σ = 156097536. Its totient is φ = 62726400.

The previous prime is 104963987. The next prime is 104963993. The reversal of 104963991 is 199369401.

It is not a de Polignac number, because 104963991 - 2² = 104963987 is a prime.

It is a super-2 number, since 2×104963991² = 22034878813296162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104963993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387186 + ... + 387456.

It is an arithmetic number, because the mean of its divisors is an integer number (4878048).

Almost surely, 2^104963991 is an apocalyptic number.

104963991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

104963991 is a deficient number, since it is larger than the sum of its proper divisors (51133545).

104963991 is an equidigital number, since it uses as much as digits as its factorization.

104963991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 104963991 is about 10245.1935560047. The cubic root of 104963991 is about 471.7154618838.

The spelling of 104963991 in words is "one hundred four million, nine hundred sixty-three thousand, nine hundred ninety-one".