749842489 has 4 divisors (see below), whose sum is σ = 818010000. Its totient is φ = 681674980.

The previous prime is 749842487. The next prime is 749842523. The reversal of 749842489 is 984248947.

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 749842489 - 2¹ = 749842487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749842487) 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, 34083739 + ... + 34083760.

It is an arithmetic number, because the mean of its divisors is an integer number (204502500).

Almost surely, 2^749842489 is an apocalyptic number.

It is an amenable number.

749842489 is a deficient number, since it is larger than the sum of its proper divisors (68167511).

749842489 is a wasteful number, since it uses less digits than its factorization.

749842489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68167510.

The product of its digits is 4644864, while the sum is 55.

The square root of 749842489 is about 27383.2519799968. The cubic root of 749842489 is about 908.4966883004.

The spelling of 749842489 in words is "seven hundred forty-nine million, eight hundred forty-two thousand, four hundred eighty-nine".