77275139 has 2 divisors, whose sum is σ = 77275140. Its totient is φ = 77275138.

The previous prime is 77275123. The next prime is 77275141. The reversal of 77275139 is 93157277.

It is a strong prime.

It is an emirp because it is prime and its reverse (93157277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77275139 - 2⁴ = 77275123 is a prime.

It is a super-3 number, since 3×77275139³ (a number of 25 digits) contains 333 as substring.

Together with 77275141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 77275096 and 77275105.

It is not a weakly prime, because it can be changed into another prime (77275039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38637569 + 38637570.

It is an arithmetic number, because the mean of its divisors is an integer number (38637570).

Almost surely, 2^77275139 is an apocalyptic number.

77275139 is a deficient number, since it is larger than the sum of its proper divisors (1).

77275139 is an equidigital number, since it uses as much as digits as its factorization.

77275139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92610, while the sum is 41.

The square root of 77275139 is about 8790.6279070383. The cubic root of 77275139 is about 425.9382069261.

The spelling of 77275139 in words is "seventy-seven million, two hundred seventy-five thousand, one hundred thirty-nine".