944998991 has 4 divisors (see below), whose sum is σ = 994735800. Its totient is φ = 895262184.

The previous prime is 944998987. The next prime is 944998997. The reversal of 944998991 is 199899449.

944998991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 944998991 - 2² = 944998987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (944998997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24868376 + ... + 24868413.

It is an arithmetic number, because the mean of its divisors is an integer number (248683950).

Almost surely, 2^944998991 is an apocalyptic number.

944998991 is a deficient number, since it is larger than the sum of its proper divisors (49736809).

944998991 is a wasteful number, since it uses less digits than its factorization.

944998991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49736808.

The product of its digits is 7558272, while the sum is 62.

The square root of 944998991 is about 30740.8358864882. The cubic root of 944998991 is about 981.3195437966.

The spelling of 944998991 in words is "nine hundred forty-four million, nine hundred ninety-eight thousand, nine hundred ninety-one".