139338833 has 2 divisors, whose sum is σ = 139338834. Its totient is φ = 139338832.

The previous prime is 139338809. The next prime is 139338841. The reversal of 139338833 is 338833931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104387089 + 34951744 = 10217^2 + 5912^2 .

It is an emirp because it is prime and its reverse (338833931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139338833 - 2¹⁸ = 139076689 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (139338803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69669416 + 69669417.

It is an arithmetic number, because the mean of its divisors is an integer number (69669417).

Almost surely, 2^139338833 is an apocalyptic number.

It is an amenable number.

139338833 is a deficient number, since it is larger than the sum of its proper divisors (1).

139338833 is an equidigital number, since it uses as much as digits as its factorization.

139338833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 41.

The square root of 139338833 is about 11804.1870961113. The cubic root of 139338833 is about 518.4307139014.

The spelling of 139338833 in words is "one hundred thirty-nine million, three hundred thirty-eight thousand, eight hundred thirty-three".