754781945 has 8 divisors (see below), whose sum is σ = 914048520. Its totient is φ = 598285440.

The previous prime is 754781917. The next prime is 754781947. The reversal of 754781945 is 549187457.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31225744 + 723556201 = 5588^2 + 26899^2 .

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

It is not a de Polignac number, because 754781945 - 2⁸ = 754781689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 754781893 and 754781902.

It is not an unprimeable number, because it can be changed into a prime (754781947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691916 + ... + 693005.

It is an arithmetic number, because the mean of its divisors is an integer number (114256065).

Almost surely, 2^754781945 is an apocalyptic number.

It is an amenable number.

754781945 is a deficient number, since it is larger than the sum of its proper divisors (159266575).

754781945 is a wasteful number, since it uses less digits than its factorization.

754781945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385035.

The product of its digits is 1411200, while the sum is 50.

The square root of 754781945 is about 27473.2951245387. The cubic root of 754781945 is about 910.4871782550.

The spelling of 754781945 in words is "seven hundred fifty-four million, seven hundred eighty-one thousand, nine hundred forty-five".