139294433 has 2 divisors, whose sum is σ = 139294434. Its totient is φ = 139294432.

The previous prime is 139294427. The next prime is 139294451. The reversal of 139294433 is 334492931.

It is a happy number.

139294433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136025569 + 3268864 = 11663^2 + 1808^2 .

It is a cyclic number.

It is not a de Polignac number, because 139294433 - 2¹⁴ = 139278049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (139294423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69647216 + 69647217.

It is an arithmetic number, because the mean of its divisors is an integer number (69647217).

Almost surely, 2^139294433 is an apocalyptic number.

It is an amenable number.

139294433 is a deficient number, since it is larger than the sum of its proper divisors (1).

139294433 is an equidigital number, since it uses as much as digits as its factorization.

139294433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 38.

The square root of 139294433 is about 11802.3062576769. The cubic root of 139294433 is about 518.3756424650.

The spelling of 139294433 in words is "one hundred thirty-nine million, two hundred ninety-four thousand, four hundred thirty-three".