139465633 has 2 divisors, whose sum is σ = 139465634. Its totient is φ = 139465632.

The previous prime is 139465607. The next prime is 139465649. The reversal of 139465633 is 336564931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98863249 + 40602384 = 9943^2 + 6372^2 .

It is an emirp because it is prime and its reverse (336564931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139465633 - 2²¹ = 137368481 is a prime.

It is not a weakly prime, because it can be changed into another prime (139465663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69732816 + 69732817.

It is an arithmetic number, because the mean of its divisors is an integer number (69732817).

Almost surely, 2^139465633 is an apocalyptic number.

It is an amenable number.

139465633 is a deficient number, since it is larger than the sum of its proper divisors (1).

139465633 is an equidigital number, since it uses as much as digits as its factorization.

139465633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 40.

The square root of 139465633 is about 11809.5568502802. The cubic root of 139465633 is about 518.5879256006.

The spelling of 139465633 in words is "one hundred thirty-nine million, four hundred sixty-five thousand, six hundred thirty-three".