749709751 has 12 divisors (see below), whose sum is σ = 888569352. Its totient is φ = 630481488.

The previous prime is 749709749. The next prime is 749709761. The reversal of 749709751 is 157907947.

It is not a de Polignac number, because 749709751 - 2¹ = 749709749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 749709695 and 749709704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749709761) 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 11 ways as a sum of consecutive naturals, for example, 141745 + ... + 146938.

It is an arithmetic number, because the mean of its divisors is an integer number (74047446).

Almost surely, 2^749709751 is an apocalyptic number.

749709751 is a deficient number, since it is larger than the sum of its proper divisors (138859601).

749709751 is a wasteful number, since it uses less digits than its factorization.

749709751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288750 (or 288743 counting only the distinct ones).

The product of its (nonzero) digits is 555660, while the sum is 49.

The square root of 749709751 is about 27380.8281649770. The cubic root of 749709751 is about 908.4430774191.

The spelling of 749709751 in words is "seven hundred forty-nine million, seven hundred nine thousand, seven hundred fifty-one".