139604849 has 2 divisors, whose sum is σ = 139604850. Its totient is φ = 139604848.

The previous prime is 139604827. The next prime is 139604887. The reversal of 139604849 is 948406931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72250000 + 67354849 = 8500^2 + 8207^2 .

It is a cyclic number.

It is not a de Polignac number, because 139604849 - 2⁸ = 139604593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139604249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69802424 + 69802425.

It is an arithmetic number, because the mean of its divisors is an integer number (69802425).

Almost surely, 2^139604849 is an apocalyptic number.

It is an amenable number.

139604849 is a deficient number, since it is larger than the sum of its proper divisors (1).

139604849 is an equidigital number, since it uses as much as digits as its factorization.

139604849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 139604849 is about 11815.4495894147. The cubic root of 139604849 is about 518.7604214484.

The spelling of 139604849 in words is "one hundred thirty-nine million, six hundred four thousand, eight hundred forty-nine".