1138979 has 2 divisors, whose sum is σ = 1138980. Its totient is φ = 1138978.

The previous prime is 1138967. The next prime is 1138987. The reversal of 1138979 is 9798311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1138979 - 2¹² = 1134883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1138919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569489 + 569490.

It is an arithmetic number, because the mean of its divisors is an integer number (569490).

2^1138979 is an apocalyptic number.

1138979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138979 is an equidigital number, since it uses as much as digits as its factorization.

1138979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 38.

The square root of 1138979 is about 1067.2295910440. The cubic root of 1138979 is about 104.4331967751.

The spelling of 1138979 in words is "one million, one hundred thirty-eight thousand, nine hundred seventy-nine".