139788533 has 2 divisors, whose sum is σ = 139788534. Its totient is φ = 139788532.

The previous prime is 139788487. The next prime is 139788541. The reversal of 139788533 is 335887931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137780644 + 2007889 = 11738^2 + 1417^2 .

It is an emirp because it is prime and its reverse (335887931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139788533 - 2⁶ = 139788469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139781533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69894266 + 69894267.

It is an arithmetic number, because the mean of its divisors is an integer number (69894267).

Almost surely, 2^139788533 is an apocalyptic number.

It is an amenable number.

139788533 is a deficient number, since it is larger than the sum of its proper divisors (1).

139788533 is an equidigital number, since it uses as much as digits as its factorization.

139788533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 139788533 is about 11823.2200774577. The cubic root of 139788533 is about 518.9878400731.

The spelling of 139788533 in words is "one hundred thirty-nine million, seven hundred eighty-eight thousand, five hundred thirty-three".