77883943 has 2 divisors, whose sum is σ = 77883944. Its totient is φ = 77883942.

The previous prime is 77883941. The next prime is 77883991. The reversal of 77883943 is 34938877.

It is a weak prime.

It is an emirp because it is prime and its reverse (34938877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77883943 - 2¹ = 77883941 is a prime.

Together with 77883941, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77883941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38941971 + 38941972.

It is an arithmetic number, because the mean of its divisors is an integer number (38941972).

Almost surely, 2^77883943 is an apocalyptic number.

77883943 is a deficient number, since it is larger than the sum of its proper divisors (1).

77883943 is an equidigital number, since it uses as much as digits as its factorization.

77883943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The square root of 77883943 is about 8825.1879866663. The cubic root of 77883943 is about 427.0538518921.

The spelling of 77883943 in words is "seventy-seven million, eight hundred eighty-three thousand, nine hundred forty-three".