77270849 has 2 divisors, whose sum is σ = 77270850. Its totient is φ = 77270848.

The previous prime is 77270827. The next prime is 77270887. The reversal of 77270849 is 94807277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60949249 + 16321600 = 7807^2 + 4040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77270849 is a prime.

It is not a weakly prime, because it can be changed into another prime (77273849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38635424 + 38635425.

It is an arithmetic number, because the mean of its divisors is an integer number (38635425).

Almost surely, 2^77270849 is an apocalyptic number.

It is an amenable number.

77270849 is a deficient number, since it is larger than the sum of its proper divisors (1).

77270849 is an equidigital number, since it uses as much as digits as its factorization.

77270849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 77270849 is about 8790.3838937785. The cubic root of 77270849 is about 425.9303246639.

The spelling of 77270849 in words is "seventy-seven million, two hundred seventy thousand, eight hundred forty-nine".