1139397977 has 2 divisors, whose sum is σ = 1139397978. Its totient is φ = 1139397976.

The previous prime is 1139397893. The next prime is 1139397979. The reversal of 1139397977 is 7797939311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 627552601 + 511845376 = 25051^2 + 22624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139397977 is a prime.

Together with 1139397979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1139397979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569698988 + 569698989.

It is an arithmetic number, because the mean of its divisors is an integer number (569698989).

Almost surely, 2^1139397977 is an apocalyptic number.

It is an amenable number.

1139397977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139397977 is an equidigital number, since it uses as much as digits as its factorization.

1139397977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2250423, while the sum is 56.

The square root of 1139397977 is about 33754.9696637399. The cubic root of 1139397977 is about 1044.4600056502.

The spelling of 1139397977 in words is "one billion, one hundred thirty-nine million, three hundred ninety-seven thousand, nine hundred seventy-seven".