744969891 has 8 divisors (see below), whose sum is σ = 1006900240. Its totient is φ = 489843072.

The previous prime is 744969887. The next prime is 744969899. The reversal of 744969891 is 198969447.

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

It is not a de Polignac number, because 744969891 - 2² = 744969887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744969899) 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, 1700626 + ... + 1701063.

It is an arithmetic number, because the mean of its divisors is an integer number (125862530).

Almost surely, 2^744969891 is an apocalyptic number.

744969891 is a deficient number, since it is larger than the sum of its proper divisors (261930349).

744969891 is a wasteful number, since it uses less digits than its factorization.

744969891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401765.

The product of its digits is 3919104, while the sum is 57.

The square root of 744969891 is about 27294.1365681349. The cubic root of 744969891 is about 906.5245574712.

The spelling of 744969891 in words is "seven hundred forty-four million, nine hundred sixty-nine thousand, eight hundred ninety-one".