77248049 has 4 divisors (see below), whose sum is σ = 77467236. Its totient is φ = 77028864.

The previous prime is 77248037. The next prime is 77248111. The reversal of 77248049 is 94084277.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29084449 + 48163600 = 5393^2 + 6940^2 .

It is a cyclic number.

It is not a de Polignac number, because 77248049 - 2⁴ = 77248033 is a prime.

It is a super-2 number, since 2×77248049² = 11934522148612802, 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 = 77247997 and 77248015.

It is not an unprimeable number, because it can be changed into a prime (77248949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109064 + ... + 109769.

It is an arithmetic number, because the mean of its divisors is an integer number (19366809).

Almost surely, 2^77248049 is an apocalyptic number.

It is an amenable number.

77248049 is a deficient number, since it is larger than the sum of its proper divisors (219187).

77248049 is a wasteful number, since it uses less digits than its factorization.

77248049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219186.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 77248049 is about 8789.0869264105. The cubic root of 77248049 is about 425.8884280244. Note that the first 3 decimals are identical.

The spelling of 77248049 in words is "seventy-seven million, two hundred forty-eight thousand, forty-nine".