991882407 has 8 divisors (see below), whose sum is σ = 1350648576. Its totient is φ = 647185592.

The previous prime is 991882393. The next prime is 991882433. The reversal of 991882407 is 704288199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 991882407 - 2⁶ = 991882343 is a prime.

It is a super-2 number, since 2×991882407² = 1967661418632227298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991882457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3517173 + ... + 3517454.

It is an arithmetic number, because the mean of its divisors is an integer number (168831072).

Almost surely, 2^991882407 is an apocalyptic number.

991882407 is a deficient number, since it is larger than the sum of its proper divisors (358766169).

991882407 is a wasteful number, since it uses less digits than its factorization.

991882407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034677.

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 991882407 is about 31494.1646499792. The cubic root of 991882407 is about 997.2867807659.

The spelling of 991882407 in words is "nine hundred ninety-one million, eight hundred eighty-two thousand, four hundred seven".