756449081 has 2 divisors, whose sum is σ = 756449082. Its totient is φ = 756449080.

The previous prime is 756449063. The next prime is 756449087. The reversal of 756449081 is 180944657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 477859600 + 278589481 = 21860^2 + 16691^2 .

It is a cyclic number.

It is not a de Polignac number, because 756449081 - 2¹⁰ = 756448057 is a prime.

It is a super-2 number, since 2×756449081² = 1144430424291489122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (756449087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378224540 + 378224541.

It is an arithmetic number, because the mean of its divisors is an integer number (378224541).

Almost surely, 2^756449081 is an apocalyptic number.

It is an amenable number.

756449081 is a deficient number, since it is larger than the sum of its proper divisors (1).

756449081 is an equidigital number, since it uses as much as digits as its factorization.

756449081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 756449081 is about 27503.6194163605. The cubic root of 756449081 is about 911.1570360711.

The spelling of 756449081 in words is "seven hundred fifty-six million, four hundred forty-nine thousand, eighty-one".