756820749 has 8 divisors (see below), whose sum is σ = 1062204640. Its totient is φ = 477992016.

The previous prime is 756820747. The next prime is 756820781. The reversal of 756820749 is 947028657.

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

It is not a de Polignac number, because 756820749 - 2¹ = 756820747 is a prime.

It is a super-2 number, since 2×756820749² = 1145555292233842002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 756820698 and 756820707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (756820747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6638722 + ... + 6638835.

It is an arithmetic number, because the mean of its divisors is an integer number (132775580).

Almost surely, 2^756820749 is an apocalyptic number.

It is an amenable number.

756820749 is a deficient number, since it is larger than the sum of its proper divisors (305383891).

756820749 is a wasteful number, since it uses less digits than its factorization.

756820749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13277579.

The product of its (nonzero) digits is 846720, while the sum is 48.

The square root of 756820749 is about 27510.3752973310. The cubic root of 756820749 is about 911.3062386519.

The spelling of 756820749 in words is "seven hundred fifty-six million, eight hundred twenty thousand, seven hundred forty-nine".