991368001 has 8 divisors (see below), whose sum is σ = 1074699584. Its totient is φ = 909046800.

The previous prime is 991367983. The next prime is 991368013. The reversal of 991368001 is 100863199.

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 991368001 - 2¹⁷ = 991236929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (991368041) 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, 250551 + ... + 254476.

It is an arithmetic number, because the mean of its divisors is an integer number (134337448).

Almost surely, 2^991368001 is an apocalyptic number.

It is an amenable number.

991368001 is a deficient number, since it is larger than the sum of its proper divisors (83331583).

991368001 is a wasteful number, since it uses less digits than its factorization.

991368001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505191.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 991368001 is about 31485.9969033855. The cubic root of 991368001 is about 997.1143480223.

The spelling of 991368001 in words is "nine hundred ninety-one million, three hundred sixty-eight thousand, one".