76122139 has 2 divisors, whose sum is σ = 76122140.
Its totient is φ = 76122138.
The previous prime is 76122131. The next prime is 76122181. The reversal of 76122139 is 93122167.
It is a weak prime.
It is an emirp because it is prime and its reverse (93122167) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 76122139 - 23 = 76122131 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 76122139.
It is not a weakly prime, because it can be changed into another prime (76122131) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38061069 + 38061070.
It is an arithmetic number, because the mean of its divisors is an integer number (38061070).
Almost surely, 276122139 is an apocalyptic number.
76122139 is a deficient number, since it is larger than the sum of its proper divisors (1).
76122139 is an equidigital number, since it uses as much as digits as its factorization.
76122139 is an evil number, because the sum of its binary digits is even.
The product of its digits is 4536, while the sum is 31.
The square root of 76122139 is about 8724.8002269393.
The cubic root of 76122139 is about 423.8091489325.
The spelling of 76122139 in words is "seventy-six million, one hundred twenty-two thousand, one hundred thirty-nine".