749456641 has 4 divisors (see below), whose sum is σ = 756332500. Its totient is φ = 742580784.

The previous prime is 749456593. The next prime is 749456681. The reversal of 749456641 is 146654947.

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

It can be written as a sum of positive squares in 2 ways, for example, as 613057600 + 136399041 = 24760^2 + 11679^2 .

It is a cyclic number.

It is not a de Polignac number, because 749456641 - 2²³ = 741068033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 749456591 and 749456600.

It is not an unprimeable number, because it can be changed into a prime (749456681) 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, 3437766 + ... + 3437983.

It is an arithmetic number, because the mean of its divisors is an integer number (189083125).

Almost surely, 2^749456641 is an apocalyptic number.

It is an amenable number.

749456641 is a deficient number, since it is larger than the sum of its proper divisors (6875859).

749456641 is a wasteful number, since it uses less digits than its factorization.

749456641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6875858.

The product of its digits is 725760, while the sum is 46.

The square root of 749456641 is about 27376.2057451357. The cubic root of 749456641 is about 908.3408325579.

The spelling of 749456641 in words is "seven hundred forty-nine million, four hundred fifty-six thousand, six hundred forty-one".