744649989 has 4 divisors (see below), whose sum is σ = 992866656. Its totient is φ = 496433324.

The previous prime is 744649979. The next prime is 744649991. The reversal of 744649989 is 989946447.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 744649989 - 2¹¹ = 744647941 is a prime.

It is a super-3 number, since 3×744649989³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744649949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124108329 + ... + 124108334.

It is an arithmetic number, because the mean of its divisors is an integer number (248216664).

Almost surely, 2^744649989 is an apocalyptic number.

It is an amenable number.

744649989 is a deficient number, since it is larger than the sum of its proper divisors (248216667).

744649989 is a wasteful number, since it uses less digits than its factorization.

744649989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248216666.

The product of its digits is 15676416, while the sum is 60.

The square root of 744649989 is about 27288.2756692320. The cubic root of 744649989 is about 906.3947801731.

The spelling of 744649989 in words is "seven hundred forty-four million, six hundred forty-nine thousand, nine hundred eighty-nine".