749780691 has 16 divisors (see below), whose sum is σ = 1120067328. Its totient is φ = 442130400.

The previous prime is 749780677. The next prime is 749780729. The reversal of 749780691 is 196087947.

It is not a de Polignac number, because 749780691 - 2⁵ = 749780659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (749280691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305815 + ... + 308256.

It is an arithmetic number, because the mean of its divisors is an integer number (70004208).

Almost surely, 2^749780691 is an apocalyptic number.

749780691 is a deficient number, since it is larger than the sum of its proper divisors (370286637).

749780691 is a wasteful number, since it uses less digits than its factorization.

749780691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614122.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 749780691 is about 27382.1235662978. The cubic root of 749780691 is about 908.4717298051.

It can be divided in two parts, 7497 and 80691, that added together give a palindrome (88188).

The spelling of 749780691 in words is "seven hundred forty-nine million, seven hundred eighty thousand, six hundred ninety-one".