77374849 has 4 divisors (see below), whose sum is σ = 78084820. Its totient is φ = 76664880.

The previous prime is 77374819. The next prime is 77374861. The reversal of 77374849 is 94847377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94847377 = 23 ⋅4123799.

It can be written as a sum of positive squares in 2 ways, for example, as 48052624 + 29322225 = 6932^2 + 5415^2 .

It is a cyclic number.

It is not a de Polignac number, because 77374849 - 2⁷ = 77374721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77374819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354822 + ... + 355039.

It is an arithmetic number, because the mean of its divisors is an integer number (19521205).

Almost surely, 2^77374849 is an apocalyptic number.

It is an amenable number.

77374849 is a deficient number, since it is larger than the sum of its proper divisors (709971).

77374849 is a wasteful number, since it uses less digits than its factorization.

77374849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709970.

The product of its digits is 1185408, while the sum is 49.

The square root of 77374849 is about 8796.2974597270. The cubic root of 77374849 is about 426.1213276788.

The spelling of 77374849 in words is "seventy-seven million, three hundred seventy-four thousand, eight hundred forty-nine".