77781083 has 4 divisors (see below), whose sum is σ = 77930328. Its totient is φ = 77631840.

The previous prime is 77781073. The next prime is 77781107. The reversal of 77781083 is 38018777.

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

It is a cyclic number.

It is not a de Polignac number, because 77781083 - 2⁶ = 77781019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77781083.

It is not an unprimeable number, because it can be changed into a prime (77781073) 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, 73838 + ... + 74883.

It is an arithmetic number, because the mean of its divisors is an integer number (19482582).

Almost surely, 2^77781083 is an apocalyptic number.

77781083 is a deficient number, since it is larger than the sum of its proper divisors (149245).

77781083 is a wasteful number, since it uses less digits than its factorization.

77781083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149244.

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 77781083 is about 8819.3584233775. The cubic root of 77781083 is about 426.8657681464.

The spelling of 77781083 in words is "seventy-seven million, seven hundred eighty-one thousand, eighty-three".