139389253 has 2 divisors, whose sum is σ = 139389254. Its totient is φ = 139389252.

The previous prime is 139389251. The next prime is 139389277. The reversal of 139389253 is 352983931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103184964 + 36204289 = 10158^2 + 6017^2 .

It is a cyclic number.

It is not a de Polignac number, because 139389253 - 2¹ = 139389251 is a prime.

Together with 139389251, it forms a pair of twin primes.

It is equal to p_7879534 and since 139389253 and 7879534 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139389251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69694626 + 69694627.

It is an arithmetic number, because the mean of its divisors is an integer number (69694627).

Almost surely, 2^139389253 is an apocalyptic number.

It is an amenable number.

139389253 is a deficient number, since it is larger than the sum of its proper divisors (1).

139389253 is an equidigital number, since it uses as much as digits as its factorization.

139389253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 43.

The square root of 139389253 is about 11806.3225858012. The cubic root of 139389253 is about 518.4932380468.

The spelling of 139389253 in words is "one hundred thirty-nine million, three hundred eighty-nine thousand, two hundred fifty-three".