991412841 has 8 divisors (see below), whose sum is σ = 1354125024. Its totient is φ = 644821280.

The previous prime is 991412827. The next prime is 991412843. The reversal of 991412841 is 148214199.

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 991412841 - 2⁷ = 991412713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 991412841.

It is not an unprimeable number, because it can be changed into a prime (991412843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4030011 + ... + 4030256.

It is an arithmetic number, because the mean of its divisors is an integer number (169265628).

Almost surely, 2^991412841 is an apocalyptic number.

It is an amenable number.

991412841 is a deficient number, since it is larger than the sum of its proper divisors (362712183).

991412841 is a wasteful number, since it uses less digits than its factorization.

991412841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8060311.

The product of its digits is 20736, while the sum is 39.

The square root of 991412841 is about 31486.7089579079. The cubic root of 991412841 is about 997.1293810989.

The spelling of 991412841 in words is "nine hundred ninety-one million, four hundred twelve thousand, eight hundred forty-one".